Google's PageRank score is not visible, but it's still a part of the ranking mechanism. To prove that, we took one of the PageRank alternatives and ran an experiment to test the correlation between its scores and search engine positions. Read on to view the results.

Google rolls out algorithm updates once or twice every month (and that's just the ones we know about!), but not all of them have an equally strong impact on the SERPs. To help you make sense of Google's major algo changes in the past years, I've put up an up-to-date cheat sheet with the most important updates and penalties rolled out in the recent years.

Just like most Google algorithm updates, RankBrain is shrouded in mystery. The truth is, RankBrain is one of the most essential parts of Google's core algorithm and machine learning system that the search engine uses to offer improved search results. In this article, you'll receive answers to the most frequently asked questions, including how RankBrain actually works, how it changed SEO, and how to optimize for it.

Ranking factors change as the search algorithm evolves. Let's have a look at what to consider as ranking factors in 2021 and what myths to leave behind.

From current ranking signals to future algorithm updates — Google patents are the ultimate source of SEO knowledge. Here are the ones you should know about.