It could also be Google Dance. Google Dance is an outdated slang term used to describe the time period when Google rebuilds its rankings, and as a result of this rebuilding, the rankings order of Websites on Google’s SERP may fluctuate repeatedly. The results fluctuate widely within a 3 to 5 days period. Googlebot revisits every website, figures out how many sites link to it, and how many it links out to, and how valuable these links are. This happens when there is your website's authority is still developing or not underdeveloped or you're probably a new website.

First of all, make sure you're making search engine submissions every day through Search Console. Secondly, guest posting can help you in better link building. Also, make sure you're performing proper website audit as well as detailed keyword research before implementing it in the HTML.