The text/HTML ratio refers to the amount of actual text content found on a web page compared to the amount of HTML code. It's usually expressed as a percentage.

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In simple terms, it's like comparing how much actual content (like words in articles, blog posts, etc.) you have on your webpage versus the technical code (HTML) that helps structure and display your webpage. A higher percentage means there's more text content than HTML code, which can be a good thing because search engines like Google prefer pages with more relevant content.