BERT

This update helped Google understand natural language search better. People no longer type in one keyword when looking for things, so it seems ever more important for Google to understand a sentence. This makes even more sense when you consider the use of smart...

Site Diversity

This was meant to address sites that appeared two or three times in the top ten for the same keyword. If the results meant that more relevant answers were being left out, then this update tried to change that so there was more diversity in the supplied sites.

Medic

Sites in health and wellbeing niches were affected hard by this update. There’s no real understanding as to what was particularly affected, but it appears Google was cleaning up its act by demoting sites with poor information, and promoting the good ones.

Mobile speed

Speed has become an ever more important aspect in ranking, and this updated was where it all started, with sites that provided quicker results being promoted.

Mobile first

Mobile now accounts for more searches than desktop, so it makes sense for Google to prioritise mobile results. This update pushed them to the front and centre of results.