OnPage means SEO based website

On-page SEO technique important factors are
Title,
Meta,
keywords,
H1, H2, H3,
Alt tag .

. title tag
.meta tag
.robot.txt
. all tags
. content
. url
. sitemap

10 On page Optimization, Techniques for Better ranking
* Blog Post Title (It makes user clicks + SEO advantage when you use Keyword)
* Post Permalink Structure makes article more user-friendly
* Heading Tags
* Keyword Density
* Meta Tags
* Addition of Images
* Word Count Per Post
* Content Interlinking
* Linking out to External Websites
* Write Engaging Content

An On-Page optimization is good tactics for getting a high a ranking factor to a website.
There are many kinds of on page tactics.
1. Meta description with quality anfd unique content
2. Image with alt text like keywords
3. URL structure
4. Title tag
5. Header tags( h1,h2,h3, etc.) within a body
6. Internal Linking

Title tag
Meta tag
keywords
H1, H2, H3...
Alt tag etc....