What are the most common issues for on page SEO ranking?

What are the most common issues for on page SEO ranking?

What are the most common on-page SEO issues, and how can you fix them?

Duplicate content. ..

.Missing alt tags and broken images. ...

Title tag issues. ..

.Meta descriptions. .

..Broken internal and external links. .

..Low text-to-HTML ratio. ...

H1 tag issues. ...

Low word count.