QUOTE(MasterChhaya @ Apr 23 2014, 11:57 AM)
The four factors of SEO describe as follow:
1. URL Factors
2. On-page Factors
3. Off-page Factors
4. Social Factors
There are only two important factors in SEO:
On Page and Off Page Optimization
URL optimization is part of On Page
Social is part of Off Page
Don't lead the other people into wrong direction