https://sitechecker.pro/site-audit-issues/text-to-code-ratio-is-low/
Pages Have Low Text-HTML Ratio: How to Detect and Fix Issue
Find out why low text to code ratio has negative impact on SEO. Use step-by-step guide to detect and fix this issue.
text html ratio
https://moz.com/community/q/topic/3736/text-to-html-ratio
Text to HTML Ratio | SEO Forum | Moz
Aug 22, 2014 - What's a good Text To HTML ratio for a website?
text to htmlseo forumratiomoz