SEO includes different process to improve seo of Article blogs and web content to increase seo ranking. keyword position in Web contents are very important, which could help to improve its google ranking in search engine results pages SERPs
seo course by google
There is no specific seo rules for text size of blog or post that could assure that your web page ranking or blog gets a higher ranking on Google. However, you should know about some general guidelines that can help you to optimize blogs and web seo text size for good google rank position.