Which are the Important factors makes ON Page Optimization better?

[warrantyau]

Which are the Important factors makes ON Page Optimization better?

[WoodsPainting]

A Secure and Accessible Website.
Page Speed (Including Mobile Page Speed)
Mobile Friendliness.
Domain Age, URL, and Authority.
Optimized Content.
Technical SEO.
User Experience (RankBrain)
Links.

[sophiawils59]

-Title Tag
-Meta Description
-Headlines
-Header Tags
-SEO Writing
-Keyword Cannibalization
-Content Audit

[jayam]

A Secure and Accessible Website.
Page Speed (Including Mobile Page Speed)
Mobile Friendliness.
Domain Age, URL, and Authority.
Optimized Content.
Technical SEO.
User Experience (RankBrain)
Links.

[qtechservers]

Meta Tags, Title tags, Unique Content, URL Structure and Website load time are the most important on-page factor in SEO.

[ritesh3592]

-Webpage Content
-Page URL
-Title Tag
-Meta Description
-Internal Links
-Heading Tags
-Keyword Frequency
-Site Speed