What is a broad core algorithm update? Learn the complete history of Google's core updates, what they are, and what's important for SEO.

From core updates to BERT, here are the big algorithm changes that shook up search rankings in 2019.

Google says that it has been rolling the algorithm change out for the past couple of days and that, again, it should affect about 10 percent of search queries made in English in the US.

“They don’t reveal everything that goes into the search algorithm, or all of the systems that power Google search,” Ghosemajumder says.

This is timely because in a rare moment of transparency, Google officials have revealed details in October 2019 of its top-secret search algorithm.

Google's Search Liaison, Danny Sullivan, has published a series of tweets regarding recent updates to search algorithms.

In response to Times articles, the search giant is changing its algorithm, part of a major shift in how Google polices harmful content.