It is a file in XML or HTML format that contains a list of urls of a web site. Having a well-optimized sitemap allows Google to more easily find the priority urls of a domain.
A well-optimized sitemap includes not only a list of URLs, but also details such as update frequency, relevance, importance and the hierarchical relationship between the different pages. This helps search engines better understand the structure of your site and prioritize which pages to index, which can improve visibility in search results.
In addition, the sitemap can include different types of URLs, such as standard web pages, images, videos, news, etc. This gives search engines more context about the type of content that your site offers, which may affect how it is displayed in search results..
