You need to understand why your site might be bleeding. It could be either because:

Google penalized the site.
The site has some issues that led to the ranking drop.

The first thing you need to do is to asses the situation and understand what’s broken on your site. I’m going to cover some of the methods which could save your site from “falling off the Google’s SERPs” (these are only some of the major reasons, as it’s impossible to encapsulate every possible situation in one article). Here are 6 important reasons way you site may have lost its Google Ranking and how you should address the drop.

1. Manual or Algorithmic Penalty Rank Drop
1.1. How to Diagnose a Google Penalty?

This is usually a big drop in search engine rankings, that happens over-night. If you notice that your site drops more than 10-20 positions on a multitude of keywords, this could indicate a penalty. A big difference between algorithmic and manual penalties is that the first ones are automatic and are usually released with various Google Updates, while the second ones are manually applied by a Google employee. Given the fact that Google made a habit out of making updates without clearly stating it, you should constantly monitor for ranking changes. You know you’ve been penalized by Google if the drop is harsh and swift, and you can see that your site continues to rank on other search engines like Bing or Yahoo.

Continue reading on https://www.alltrends.co/how-to-re-rank-demoted-website-post-to-rank-higher-on-google/