Here is the full change-log and new features details.
Google added new Badminton and And Golf Doodle game in today's update.
Speed and stability & Minor bug fix
There are no major changes I found in today's Google app update. But if you are a Doodle lover than you must have download today's update.
I found new doodle games after installing today's update on my Nexus 6P.
Else, I also found app stability and performance improvements after installing today's update. They also fixed all bugs in today's update.
Download the APK file of this update from below link:
Google App v6.2.34 APK