Mobile Alternates In Sitemaps
What does this report contain?
URLs which were found within the mobile/AMP rel alt tag of another page, which were found in a sitemap during the crawl.
How can this report be used?
Sitemaps play an important role in how search engines discover pages on a website. These mobile alternates have correct reciprocation set up, so are likely to be discovered by search engines, who may follow the canonical tag to find the desktop pages.