Part of On Page Optimization:-

1.) Tag Optimization

a.) Title (60 Characters)

b.) Meta Keywords (140 Characters)

c.) Meta Description (140 Characters)

d.) Heading

e.) Bold

f.) ALT & title in Image Tag

g.) URL

2.) Canonicalization Installation
3.) !Doctype and W3C Validation
4.) Fav Icon
5.) Text / Code Ratio
6.) Web Speed Optimization (3 Sec.)
7.) Linking
8.) Conversion Form
9.) Sitemap.xml / Robots.txt
10.) Usability / Accessibility

11.) Web Speed Optimization (3 Sec.)

a.) CSS & JavaScript File Optimization
b.) Optimization of non-index able attribute

12.) Linking

a.) Internal
b.) External
c.) Broken (Custom 404 Error Page )