Which is more useful between an HTML sitemap and an XML sitemap?
They are made for different readers, so one is not simply better than the other.
XML sitemap
HTML sitemap
Written for search engines
Written for visitors
A file with a list of URLs, in XML format
A normal web page with links
Helps Google to discover and crawl pages
Helps people to find pages, and adds internal links
Submitted in Google Search Console
Linked from the footer
For SEO, the XML sitemap is more important, and almost every site should have one. An HTML sitemap is optional and useful for big sites. See XML Sitemap.
