Meta tags Creation its the first steps..

Keyword research should be the first step in on-page optimization.

First step in On page optimization is website Analysis

What is Domain Name
Check EMD
What kind of website
Which kind of Website business doing
Its fresh website or old
Did Before SEO .

This is the first steps but its very lengthy then we start content duplicacy ,keyword research and other thing

selecting keyword for website firstly .

Content using correct keywords for you niche. fast loading pictures and good content