Google Search Console Mobile Usability Warning

He also stated that it can take some time for these types of changes to trickle through. Google search console mobile usability warning led to a drop in rankings for a medical website. The person who posted on Reddit fixed the problem, but their rankings have not yet recovered. John Mueller from Google responded, saying that the mobile usability issue was not related to the rankings drop, and that it can take some time for these changes to take effect. The purpose of the Google Raters Guidelines is to provide a way to assess the quality of a site in an objective manner, without involving subjective ideas about what constitutes site quality. It just so happens that Google has recently published new documentation to help publishers understand what sort of content is likely to be ranked highly by the Google algorithm. According to Google's help page, the algorithm takes many factors into account when trying to determine whether a webpage is expert, authoritative and trustworthy. Google’s Search Quality Raters Guidelines (PDF) provides an insight into how the algorithm works. According to John Mueller, it is beneficial for anyone looking to improve their understanding of Google Search Console/Mobile Usability fixes to read the Guidelines. The algorithm attempts to assess three things: The meaning of a search query, the meaning of web pages, and the quality of the pages themselves.

(source: https://www.searchenginejournal.com/google-rankings-and-mobile-usability/470793/)