What are the 3 most important on page SEO factors?

The three most important on-page SEO factors are title tags, meta descriptions, and header tags. Title tags are the most important on-page factor for SEO, as they tell search engines what the page is about. Meta descriptions are also important, as they give searchers a summary of what the page is about. Header tags are essential for two reasons: they help break up the content on the page, and they give search engines an idea of what the page is about.