What is important on page techniques in SEO?

[aliceta]

Use SEO-Friendly URLs.
Avoid ugly URLs: backlinko.com/p=123. ...
Start Title With Keyword.
Add Modifiers To Your Title.
Wrap Your Blog Post Title in an H1 Tag.
Dazzle with Multimedia.
Wrap Subheadings in H2 Tags.
Drop Keyword in First 100 Words.