When Google sees a tactic that seemingly is trying to manipulate a search engine, they change their algorithm to downgrade content that is breaking the rules. Google search console can let you know if any manual action is happening against your website. This gives you the chance to fix it. Fixing the issue can give your site a chance to recover before the damage is long term. Remember any black hat SEO technique can result in a drop in ranking. Always follow proper search engines guidelines. You don't want to have your site banned.