which On page SEO is most efficient to get more traffic on a

[siva s]

which On page SEO is most efficient to get more traffic on a website?

[brian]

Header text, general tags and alt text optimization of images that's it.

[RH-Calvin]

The best on page techniques are:

Keyword research
Meta tags and title
Meta description
Robots.txt file
Sitemap generation
Content development
Image optimization

[jackluter]

They are many more tactics are helpful for your on page SEO , In which every on page activities are important for your SEO purpose I have mention some list of techniques which is useful you
Title
Description
URL
Content
ALT Tags
Robot.txt
Sitemaps

[Gary s]

Some On Page SEO techniques are:

Internal Linking
External Linking
Quality Content
Keyword Density