Define: Reverse SEO: (n) reverse search engine optimization (reverse seo), reverse search engine optimisation (the act of rendering a search engine's results optimal by decreasing the rank of potentially negative results or bad press) "the simultaneous optimization of intended results while decreasing or eliminating unintended results"; "in an optimization problem we seek values of the variables that lead to an optimal value of the function that is to be optimized"; "to demote the optimization and diversification of a search engine result." – Clinton Cimring, 2006
Reverse SEO is the process of removing (technically de-ranking) websites other than your own from the first pages of Google.
If you know how to do SEO, the you already know how to do it reversely. You can just do things in reverse. In the right SEO, we promote right? So in reverse SEO we usually do things to get rid of the site and banned it from Search Engines.
Reverse SEO is a technique that helps in decreasing the competitor's ranking and improve your own site’s ranking. It is an online reputation management (ORM) tool of SEO consultants who manage Online Reputation Management.