Factors to consider On-page.

[lahmanwokard]

Some of the factors you need to consider with regards to On-Page are:
Title tags
Alt tags (use when describing images)
Meta tags
Description
Heading tags (h1/h2)
Keywords.

[aarenlainey]

Interesting article which is covering the basics, this are main factors for On-page..
Let me describe in detail few of them:
Title Tag:
1.This is main tag, we shouldn’t have duplicate title tags in one page.
2.Title tag is not used only to display company name only.
3.There are 2 factors you need to take into consideration:One is Prominence and other is Proximity

Keyword:
Many search engine search according to Keyword. It is most important factor.

[rogerdavid101]

On page Optimization is the main part of SEO. If metatags and content of website is of quality then google shift it on top. keyword research and analysis, meta tag creation, image optimization, validation check, content optmization and much more thing are included in it. But ranking of any website also depends on the off page work. so it is important that both on page and off page should be of good quality.