google algorithms

Hi guys my site has suddenly dropped in google ranking.I can also find a few other sites which have dropped suddenly. Did anybody experienced the same? Can someone tell me what will be the reason.Not only my site multiple sites are dropping for multiple keywords.Can somebody share some info..

You cannot rank high if you can't manage to drive 150-600 good links to your website. It's the rule for adult niche, excluding hard porn. Plus, Google take escort websites and directories as something light. We all know that since 2012 for our niche. Now we need to be even lighter. Remove...