The Text-to-HTML ratio refers to the amount of actual text content compared to the amount of HTML code on your webpage. This ratio isn’t a direct ranking factor for Google, but it can impact how search engine crawlers perceive the relevancy and quality of your webpage.
For example If you move text from your main homepage to the site footer, it will not change the overall Text-to-HTML ratio for the entire website. The ratio is calculated for each individual page, not the website as a whole. If you add more text to the footer, which is part of the HTML of each page, it could theoretically increase the ratio on every page where the footer appears, not just the homepage. (I am just telling you so you can tell them why it’s not worth it)
However, from an SEO perspective, it’s important to note that search engines often give less weight to text placed in footers compared to main body content. So if the text is important for your keywords, you may want to think carefully about this move.
Remember that user experience is increasingly important in SEO. Even if your Text-to-HTML ratio improves, if the change negatively affects the user experience or makes your content less accessible, it could potentially harm your site’s performance in search results.
To improve your Text-to-HTML ratio, focus on reducing unnecessary HTML elements and increase the amount of quality, relevant text content. But, the best approach is to focus on overall site quality, usability, and content relevance rather than individual metrics.