While PlayerUnknown's Battlegrounds is off suing Fortnite for copyright infringement, a new patch has landed on PUBG's PC servers, introducing a host of changes, tweaks, and bug fixes. Some of these changes come in the form of the effectiveness of throwables (i.g. frag grenades, Molotovs, and stun grenades), a nerf of the M24 sniper and a new anti-cheat mechanism.
With this new patch update, frag grenades see a damage and radius buff, Molotovs have an increased area of effect and will explode when shot in mid-air and stun grenades will impair players more effectively. The M24 was nerfed, removed from care package drops, and added to the world's loot spawn system, making it a viable alternative to the Kar98K bolt action rifle.
In addition to the anti-cheat tech--which is "currently only on the test servers (until) additional testing is complete," according to the patch notes--performance has been improved as well. The rendering of character models have been updated to prevent frame drops, character movement, and animations while skydiving has been optimized to increase framerate, and abnormal vehicle physics should be resolved. Most notable, however, is the improvements made to the game's net code, meaning you should see reduced network latency and improved server responsiveness.