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

How To Use HTML Meta Tags Meta tags aren’t a magical solution, but they will help ensure your website appears on search engine results pages. This tutorial explains what HTML meta tags are, which meta ...

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.

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