https://www.gamespot.com/articles/pubg-pc-patch-out-now-heres-what-it-does/1100-6456156/

A new patch is available now for the PC edition of PUBG. This is not the biggest or most significant of patches following the 1.0 release in December, but it does include some notable changes and fixes. Starting off, it includes a client optimisation that should improved general performance when a lot of players are in the same area simultaneously. If players are bunched up like this, you can expect there would be a big firefight, so it's good to know performance should now be better in such an important time in your gameplay session.

There are also two bug fixes included with the new PUBG PC patch, the first of which fixes an issue where your character could be "instantly stopped and adjusted." The second fix is for a problem where the way your character moved during a replay seemed off. These are minor but welcome changes, and it's good to see developer PUBG Corp. continue to release updates to address the feedback fans have been sending in.