Bing tests large single ad unit at top of search results: protecting organic CTR and WooCommerce traffic

On 14 October 2026 Search Engine Roundtable reported that Microsoft Bing is testing a large single ad unit at the top of the search results page (Search Engine Roundtable). Instead of the usual stack of text ads, one sponsored result sits in its own block with a gray background, an image, a call to action button, and the familiar URL, title and ad description.

The source is thin, and it is worth being exact about that. The test was spotted by Khushal Bherwani, who posted a screenshot on X and wrote: “Bing testing a dedicated placement for sponsored ads at top of serp.” (Khushal Bherwani via Search Engine Roundtable). Microsoft has not published an announcement, a rollout date, a list of markets or any click data. Tests like this can disappear without ever shipping.

For a WooCommerce store that is a reason to prepare, not to panic. A bigger first ad means more pixels between the searcher and the first organic result, and that matters most on commercial queries where advertisers bid. The useful response is the same whether the format ships or not: measure your Bing CTR properly, keep the catalog fresh in Bing’s index, give Microsoft Shopping a clean feed, and make sure the store answers quickly when a searcher does scroll past the ad.

This guide covers what the test shows, how to measure its effect on your own site, and the WordPress and WooCommerce changes that pay off in Bing search regardless of what Microsoft decides.

#What Bing is testing at the top of the results page

On a standard Bing results page, sponsored results appear as a group of text ads or as a product carousel. In the reported test, a single advertiser gets a dedicated placement above everything else. Based on the screenshot described by Search Engine Roundtable, the unit contains:

1. A gray background that separates it from the organic results below.
2. An image next to the ad text.
3. A call to action button, which is not part of a standard text ad.
4. The URL, title and ad description, the same elements a normal search ad carries.

Barry Schwartz, who wrote the report, also noted that the unit looks unusual enough to be mistaken for something else, which is a reminder that Bing will be watching user reactions before deciding anything.

What the reports do not say is just as important. There is no published pixel height, no information on whether the unit appears on mobile, no statement about how the winning advertiser is chosen, and no data on how it changes clicks for the results below.

The schematic below shows only what is known: one sponsored block placed above the organic results.

Standard Bing results page:
+----------------------------------------------+
| [Sponsored text ads or product carousel]     |
+----------------------------------------------+
| [Organic result #1]                          |
+----------------------------------------------+
| [Organic result #2]                          |
+----------------------------------------------+

Reported test (October 2026):
+----------------------------------------------+
| [Single sponsored unit, gray background]     |
|  image | title, URL, description | CTA button|
+----------------------------------------------+
| [Organic result #1]                          |
+----------------------------------------------+
| [Organic result #2]                          |
+----------------------------------------------+

#How a larger top ad can affect organic CTR for a WooCommerce store

No click data has been published for this test, so any percentage you read about its impact is a guess. What can be said without guessing is structural.

• Generic commercial queries carry the most risk. Ads appear where advertisers bid. Broad queries such as “espresso machine” or “trail running shoes” attract the most bids, so they are where a dedicated ad placement would show up most often.
• Specific product and part number queries carry less. A searcher typing an exact model or part number is looking for one item and tends to check several results. These queries also attract fewer advertisers.
• Average position can stay flat while CTR drops. If a page keeps ranking first but sits lower on the screen, the position in your reports will not change. Only CTR at that position will. This is why a ranking report alone will not show the effect.

The practical conclusion is to separate your Bing keywords into generic category terms and specific product terms before you look at the data. If the test reaches your market, a CTR drop should appear first in the generic group.

#How to measure Bing organic CTR changes in Bing Webmaster Tools

The Search performance report in Bing Webmaster Tools is the right instrument. According to Bing’s documentation, it shows clicks, impressions, average CTR and average position for your site, by keyword and by page, for up to the past six months, and the data can be exported to CSV (Bing Webmaster Tools: Search performance).

A few details in that documentation decide how you read the numbers:

• Impressions and clicks include more than web results. Since 24 March 2023 the report also counts Chat, News, Images, Videos and Knowledge Panel traffic, which changed average CTR calculations. Filter to the Web source when you compare organic CTR.
• Average position exists only for Web and Chat. The other sources report clicks, impressions and CTR only.
• There is no backdated data. Collection starts when the site is added to Bing Webmaster Tools. A store that is not verified yet should add itself now, so a baseline exists before any layout change reaches its market.
• Position-level drilldown exists. Clicking a keyword shows the pages served for it, and clicking a page shows position-wise metrics for that keyword and page combination.

A simple method for a WooCommerce store:

1. Export keywords and pages for the last full month as a baseline.
2. Tag each keyword as generic or specific (category term versus model, SKU or part number).
3. Each month, compare average CTR for keywords whose average position stayed within the same range.
4. If CTR falls in the generic group while position holds, a layout change is the likely cause. If both groups fall, look for a technical problem first.

This takes an hour a month and replaces speculation with your own numbers.

#How to track Copilot citations with the AI Performance report

Bing also reports how often your content is cited in AI generated answers. The AI Performance report covers Microsoft Copilot, AI generated summaries in Bing and selected partner integrations. It shows total citations, cited pages, average cited pages per day and the grounding queries the AI used when it retrieved your content (Bing Webmaster Tools: AI Performance).

Two limits in Bing’s own wording matter here. The report measures visible citations only, not rankings or importance. And trends in it are observational: Bing states they cannot be attributed to a specific cause, such as one content change or one model update.

For a store, the grounding queries tab is the most useful part. It shows which phrasing led the AI to your pages, which often points to buying guides, compatibility tables and specification pages rather than category listings. That is a signal for which content deserves more detail, not a promise of more traffic.

#How to set up IndexNow in WordPress and WooCommerce

IndexNow is an open protocol for telling search engines that a URL was added, updated or deleted. The rules that matter for an implementation come straight from the protocol documentation (IndexNow documentation):

• The key must be 8 to 128 characters and may contain only a to z, A to Z, 0 to 9 and dashes.
• A single POST request can carry up to 10,000 URLs.
• An HTTP 200 response only means the search engine received the URLs. It is not a crawl or indexing guarantee.
• Search engines that adopt IndexNow agree to share submitted URLs with the other participating engines.

The response codes tell you what went wrong: 202 means the URL was received and key validation is pending, 400 means invalid format, 403 means the key was not found or does not match the key file, 422 means the URLs do not belong to the host or the key does not match the protocol schema, and 429 means too many requests.

The snippet below collects changed URLs during a request and sends them once at shutdown. WooCommerce can fire woocommerce_update_product more than once per save, so batching avoids duplicate submissions.

add_action('woocommerce_update_product', 'wppoland_queue_indexnow_product', 10, 1);
add_action('save_post_post', 'wppoland_queue_indexnow_post', 10, 1);
add_action('shutdown', 'wppoland_flush_indexnow_queue');

function wppoland_indexnow_queue(?string $url = null): array {
    static $queue = [];
    if ($url !== null) {
        $queue[$url] = true;
    }
    return array_keys($queue);
}

function wppoland_queue_indexnow_product(int $product_id): void {
    $product = wc_get_product($product_id);
    if ($product && $product->get_status() === 'publish') {
        wppoland_indexnow_queue($product->get_permalink());
    }
}

function wppoland_queue_indexnow_post(int $post_id): void {
    if (wp_is_post_revision($post_id) || wp_is_post_autosave($post_id) || get_post_status($post_id) !== 'publish') {
        return;
    }
    wppoland_indexnow_queue(get_permalink($post_id));
}

function wppoland_flush_indexnow_queue(): void {
    $urls = wppoland_indexnow_queue();
    $key  = defined('INDEXNOW_API_KEY') ? INDEXNOW_API_KEY : '';
    if ($key === '' || $urls === []) {
        return;
    }

    wp_remote_post('https://api.indexnow.org/indexnow', [
        'timeout'  => 5,
        'blocking' => false, // do not delay the admin request
        'headers'  => ['Content-Type' => 'application/json; charset=utf-8'],
        'body'     => wp_json_encode([
            'host'        => wp_parse_url(home_url(), PHP_URL_HOST),
            'key'         => $key,
            'keyLocation' => home_url('/' . $key . '.txt'),
            'urlList'     => array_slice($urls, 0, 10000),
        ]),
    ]);
}

The key file is a UTF-8 text file named after the key, containing the key, placed in the root directory of the host (the directory that serves https://your-domain/, usually the one with wp-config.php or index.php). The documentation strongly recommends the root. If you use the keyLocation option with a file in a subfolder, that key can only submit URLs under the same path: a key in /catalog/ cannot submit URLs from /help/.

Because blocking is false, the code never sees the response code. Test the key once by hand with curl and check for 200 or 202 before you rely on the hook.

#How to build a WooCommerce product feed for Microsoft Merchant Center

To appear in Microsoft Shopping ads, including any new top placement, products go through a feed in Microsoft Merchant Center. The product attributes page lists the rules (Microsoft Advertising: Product attributes). The ones that most often trip WooCommerce stores:

• Price must match the landing page. Microsoft verifies it and recommends keeping the landing page current with structured data markup. Tax handling depends on the market: prices exclude tax for the United States and include VAT for the United Kingdom, with details in the feed tax policy.
• Description has no HTML and a 10,000 character limit. Title has a 150 character limit and should not contain promotional text.
• Brand is the manufacturer. Microsoft says not to add your store name as the brand unless you manufacture the product.
• GTIN is numeric, up to 14 digits per value. When a product has neither GTIN plus brand nor MPN plus brand, new products need identifier_exists set to FALSE.
• Shipping is required only for Austria and Germany. Elsewhere it is optional.
• Custom labels custom_label_0 to custom_label_4 take up to 100 characters each, with up to 1,000 unique values per label.
• Review takes time. A new item, or a change to title, description, link or image, can stay in review for up to three business days. Price and availability updates can take up to 24 hours to process.
• Robots.txt must allow Microsoft Advertising to crawl the site. Ads cannot serve if crawling is incomplete.

The function below maps a WooCommerce product to those attributes. It reads GTIN through get_global_unique_id(), which WooCommerce added in version 9.1.0 (WooCommerce source), and brand from the product_brand taxonomy that WooCommerce core registers.

function wppoland_get_microsoft_merchant_item(WC_Product $product): array {
    $brands = wp_get_post_terms($product->get_id(), 'product_brand', ['fields' => 'names']);
    $brand  = (!is_wp_error($brands) && $brands) ? $brands[0] : '';
    $gtin   = $product->get_global_unique_id(); // WooCommerce 9.1.0+

    $item = [
        'id'             => $product->get_sku() ?: (string) $product->get_id(),
        'title'          => mb_substr($product->get_name(), 0, 150),
        'description'    => mb_substr(wp_strip_all_tags($product->get_description() ?: $product->get_short_description()), 0, 10000),
        'link'           => $product->get_permalink(),
        'image_link'     => wp_get_attachment_url($product->get_image_id()),
        'availability'   => $product->is_in_stock() ? 'in stock' : 'out of stock',
        // must equal the price shown on the product page for the target market
        'price'          => number_format((float) wc_get_price_to_display($product), 2, '.', '') . ' ' . get_woocommerce_currency(),
        'condition'      => 'new',
        'custom_label_0' => (string) ($product->get_meta('_erp_margin_tier') ?: 'standard'),
    ];

    if ($brand !== '') {
        $item['brand'] = $brand;
    }
    if ($gtin !== '') {
        $item['gtin'] = $gtin;
    }
    if ($brand === '' || $gtin === '') {
        $item['identifier_exists'] = 'FALSE'; // custom or unbranded goods only
    }

    return $item;
}

wc_get_price_to_display() follows the store’s tax display setting, so the feed shows the same price as the product page. If one store serves markets with different tax rules, generate one feed per market. Only set identifier_exists to FALSE for products that really have no manufacturer identifiers; for branded goods, fill in the GTIN instead.

For larger catalogs, stock and margin data usually live in the ERP. A WooCommerce ERP integration keeps availability and custom labels in the feed in step with the warehouse, which matters because an out of date price or stock flag is exactly what Microsoft’s review checks.

#How to verify Bingbot and control its crawl rate

Frequent IndexNow submissions bring Bingbot back to the store more often. Before giving crawler traffic special treatment in server rules, make sure it really is Bingbot. A user agent string is trivial to fake.

Bing’s documented method has two steps (Bing Webmaster Tools: How to verify Bingbot):

1. Run a reverse DNS lookup on the IP address from your logs and check that the name ends in search.msn.com.
2. Run a forward DNS lookup on that name and confirm it resolves to the same IP address.

# example from Bing's documentation
host 157.55.39.1
# 157.55.39.1.in-addr.arpa domain name pointer msnbot-157-55-33-18.search.msn.com
host msnbot-157-55-33-18.search.msn.com
# msnbot-157-55-33-18.search.msn.com has address 157.55.39.1

Bing advises against hardcoding IP addresses or ranges. If you match by IP instead of DNS, use Bing’s published list and refresh it daily, because Microsoft can change it at any time. A public Verify Bingbot tool is also available in Bing Webmaster Tools.

If crawling competes with shoppers during busy hours, Bing Webmaster Tools has a Crawl control setting. It lets you set Bingbot’s crawl speed faster or slower than the baseline for each of the 24 hours of the day, either from a preset based on your busiest hours or with a custom pattern (Bing Webmaster Tools: Crawl control). One catch: a crawl-delay directive in robots.txt always takes precedence over this setting, so remove an old crawl-delay line if you want the hourly pattern to apply.

Before you buy more server capacity, check whether the server is the problem at all; the checks in a WordPress security audit often find bot traffic, slow plugins or missing caching first.

#How to configure Nginx FastCGI caching for crawlers and shoppers on WooCommerce

A searcher who scrolls past an ad and clicks your result expects the page to load quickly. Google’s web.dev guidance gives a rough target: a good Time to First Byte is 0.8 seconds or less, and a poor one is above 1.8 seconds (web.dev: Time to First Byte). TTFB is not a Core Web Vitals metric, but a slow first byte delays everything after it, including Largest Contentful Paint.

Full page caching serves anonymous visitors and crawlers from cache. On WooCommerce it must never cache the cart, checkout, account pages or any visitor who has items in the cart. The configuration below shows the shape; adjust the paths to your localized cart and checkout slugs.

# http block
fastcgi_cache_path /var/cache/nginx/wordpress levels=1:2 keys_zone=WORDPRESS:100m inactive=60m;
fastcgi_cache_key "$scheme$request_method$host$request_uri";

# server block
set $skip_cache 0;
if ($request_method = POST) { set $skip_cache 1; }
if ($query_string != "") { set $skip_cache 1; }
if ($request_uri ~* "/(cart|checkout|my-account)/|/wp-admin/|/wp-json/|/xmlrpc.php") { set $skip_cache 1; }
if ($http_cookie ~* "wordpress_logged_in|woocommerce_items_in_cart|wp_woocommerce_session") { set $skip_cache 1; }

location ~ \.php$ {
    include fastcgi_params;
    fastcgi_pass unix:/run/php/php8.3-fpm.sock;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

    fastcgi_cache WORDPRESS;
    fastcgi_cache_bypass $skip_cache;
    fastcgi_no_cache $skip_cache;
    fastcgi_cache_valid 200 301 60m;
    fastcgi_cache_use_stale error timeout updating http_500;
    add_header X-FastCGI-Cache $upstream_cache_status;
}

Bingbot does not need its own rule here: it arrives without cart cookies, so it receives cached pages like any anonymous visitor. Two further measures help on catalogs that change often:

1. Persistent object cache (Redis or Memcached). Product data and options stay in memory, so uncached requests run fewer database queries.
2. Move ERP synchronization off the request path. Run stock and price imports as background jobs (for example with Action Scheduler, which ships with WooCommerce) instead of during page loads.

When a product price changes, purge that product’s cached page in the same step that queues the IndexNow submission. Otherwise Bingbot and Microsoft’s price check may both see the old price.

#How to add Product structured data without invented values

Microsoft’s feed documentation links landing page structured data to price verification, and Bing’s AI surfaces cite pages they can read cleanly. Both reward markup that states real product data, and both are hurt by markup that does not.

WooCommerce already outputs Product structured data. The filter below adds brand, GTIN and selected attributes only when the product actually has them. It never fills a gap with a default value, because a default such as a power rating or material would be false for every product that lacks it.

add_filter('woocommerce_structured_data_product', function (array $markup, WC_Product $product): array {
    $brands = wp_get_post_terms($product->get_id(), 'product_brand', ['fields' => 'names']);
    if (empty($markup['brand']) && !is_wp_error($brands) && $brands) {
        $markup['brand'] = ['@type' => 'Brand', 'name' => $brands[0]];
    }

    $gtin = $product->get_global_unique_id();
    if ($gtin !== '' && empty($markup['gtin'])) {
        $markup['gtin'] = $gtin;
    }

    $properties = [];
    foreach (['power' => 'Power', 'material' => 'Material'] as $slug => $label) {
        $value = $product->get_attribute($slug);
        if ($value !== '') {
            $properties[] = ['@type' => 'PropertyValue', 'name' => $label, 'value' => $value];
        }
    }
    if ($properties) {
        $markup['additionalProperty'] = $properties;
    }

    return $markup;
}, 10, 2);

Replace power and material with the attribute slugs your catalog uses. The point is the pattern: structured data copies what the product page states, and the same values go into the Merchant Center feed, so the page, the markup and the feed never disagree.

#Action matrix for WooCommerce teams

#Implementation order for development teams

The test may never leave the experiment stage. Every step below still improves how the store performs in Bing today.

1. Verify the site in Bing Webmaster Tools and export a baseline.
   • Without a baseline there is nothing to compare against, and Bing does not backfill data.
2. Turn on IndexNow.
   • Generate a key, place the key file in the root, test it with curl, then enable the batched hook.
3. Clean up the Microsoft Merchant Center feed.
   • Manufacturer brand, real GTINs, price equal to the product page, shipping for Austria and Germany if you sell there.
4. Protect performance.
   • Full page caching with WooCommerce exclusions, a persistent object cache, ERP sync off the request path, and Crawl control if Bingbot competes with peak traffic.
5. Fix structured data.
   • Remove any default values from Product markup and keep it identical to the feed.
6. Review monthly.
   • Compare CTR for generic and specific keywords at stable positions, and check grounding queries in AI Performance.