16 Things That Can Hurt Your Site Rankings (SEO Checklist)
The worst nightmare for a webmaster happens when they find a sudden drop in their site rankings and all their hard work is gone! Are you one of those? Well, take a deep breath! You are not the only one. Every website has faced or will face a drop in rankings in the future.
Source: 16 Things That Can Hurt Your Site Rankings (SEO Checklist)