The Acquisition > Google Ads > Sitelinks report helps you understand the performance of each sitelink in your Google Ads account.
Sitelinks help users go deep into your website, directly from a Google Ads ad. Sitelinks appear beneath the text of your ads, helping customers find what they're looking for on your site with just one click. Sitelinks appear in ads at the top and bottom of Google search results. You can add sitelinks when you create your campaign in Google Ads. You can edit your link text and URLs, and see how ads that contain sitelinks perform in the Ad extensions tab in Google Ads.
If one sitelink performs significantly better than another, you can choose to use the better-performing sitelink in more places across your Google Ads account(s). Alternatively, if a sitelink performs significantly worse, consider replacing or deleting it.
Only clicks on the sitelinks themselves are included in the Analytics Sitelinks report; clicks on the headline of the search ad in which the sitelink appeared are not shown. This is different from sitelinks reporting in Google Ads. (In Google Ads, clicks on any part of the search ad are included in the sitelinks statistics.)
Visit the Google Ads Help Center to learn more about the sitelinks ad extension