A `sitemap.xml` file is an XML document that provides search engines with a roadmap of a website's content. It helps search engines crawl the site more efficiently. Here are some key points about `sitemap.xml`:
Purpose: To inform search engines about pages on the site that are available for crawling.
Structure: It typically contains a list of URLs and additional information about each URL, such as:
Last modified date
Change frequency
Priority
Format: The file must be in a specific XML format. Here’s a simple example: