On page seo is about the changes you have to made to your webpage.Its internal optimisation of your website  that you can control.

As opposed to onpage , off page seo is the exact opposite where  the seo is done by  creating links and social bookmarks etc  and is also called external seo.

on page seo on websites with off page seo

The best On page SEO tips and technique are

1. Page Title
2. Meta keywords
3. Meta Descriptions tag
4. URL Structure for each page
5. Structure Your Website For Easy Navigation
6. Write Useful Contents
7. Header Tags For Titles
8. Alt Text For Images etc.

online Outsmarting google book from transparent SEO

Good luck !! with you onpage seo and off page seo