Google Ranking - KEYWORD plays very important role

Here we are discussing importance of keywords in website development.
Domain name and page names should be a valid Keyword relevant to the web content.
In URL first words are very important
Areas where KEYWORD plays very important role :
1.Page Header with proper Keywords
2.Page Title tag with proper Keyword
3.Description Meta tag with Keyword
4.Keyword in metatag
5.Keyword density in body text
6.Keyword in H1, H2 and H3
7.Font size of Keyword
8.Keyword in alt text
9.Keyword in links to site pages (anchor text)