Check out this nice infographic about the history of Google major search ranking algorithm updates. Since early 2017 Google officially does not confirm many updates and declares these as part of Broad Core Algorithms. The details of the Google algorithm updates can be found here. The recent one is BERT update Sep-October 2019.
Bidirectional Encoder Representations from Transformers codenamed BERT, is a machine learning advancement made by Google involving it’s Artificial Intelligence innovation efforts. BERT model processes words in relation to all the other words in a sentence, rather than one-by-one in order. This gives more impetus to the user intent and context of the search query and delivers results that the user seeks.
All you need to focus on quality content. The quality of content guideline can be found here .