Sitemap.xml is particularly for a search engines, Which helps search engine to crawl easily on a website.

This is important because Google ranks web PAGES not just websites. There is no downside of having an XML Sitemap and having one can improve your SEO.

A good XML sitemap acts as a roadmap of your website that leads Google to all your important pages. XML sitemaps can be good for SEO, as they allow Google to find your essential website pages quickly, even if your internal linking isn't perfect.

An XML sitemap is a file that lists a website's essential pages, making sure Google can find and crawl them all. It also helps search engines understand your website structure. You want Google to crawl every important page of your website.