What sort of update is it?It is one of Google’s ‘core search quality’ updates which are periodically released as broad changes to the core algorithm. Updates such as Panda (low quality/duplicate content) and Penguin (low quality links) tend to target specific elements of the overall ranking process, but on other occasions, such as this, a number of changes have been bundled together. As it has just been launched, information on industries and sites affected (positively and negatively) and possible causes is thin on the ground, but there are some things we do know.
A rare pre-announced updateDue to the large-scale nature of the update,this particular change is unusual as it was announced by Danny Sullivan, Google’s Search Liaison prior to launch on June 3rd. This suggests that Google were aware that this was going to impact a large number of queries and domains during the roll-out phase.
Tomorrow, we are releasing a broad core algorithm update, as we do several times per year. It is called the June 2019 Core Update. Our guidance about such updates remains as we’ve covered before. Please see this tweet for more about that: https://t.co/tmfQkhdjPL— Google SearchLiaison (@searchliaison) June 2, 2019
Site diversity in the search resultsOne confirmed adjustment that Google have made is the below:
Have you ever done a search and gotten many listings all from the same site in the top results? We've heard your feedback about this and wanting more variety. A new change now launching in Google Search is designed to provide more site diversity in our results….— Google SearchLiaison (@searchliaison) June 6, 2019