Off Page Web Spam Factors

1. Unnatural Influx of Links
2. Penguin Penalty
3. Link Profile with High percentage of Low Quality links
4. Linking domain Relevancy
5. Unnatural Links warning
6. Links from the Same C Class IPs
7. Poison Anchor text
8. Manual Penalty
9. Selling Links
10. Google sand Box
11. Google Dance
12. Disavow Tool
13. Reconsideration Request