Google displays a block of HTML code you can insert into your Web documents, which allows allow users to use the custom search engine directly from your website without leaving the page.

Later search engines introduced so-called XML sitemaps meant to replace manual “search engine submission.” More than 25 years later, HTML sitemaps are less preferred.

Google's John Mueller advises using semantic HTML. Though not a ranking factor, it helps search engines understand content and boosts accessibility.

Learn how to use HTML tags to structure web pages, improve SEO, and create better user experiences.

A start-up called Perplexity shows what’s possible for a search engine built from scratch with artificial intelligence.