They added three new main features in this update :
1 Commenting Option : Google added new commenting option in Google Photos. This option will help you to comment on shared albums. Commenting option is available for individual photos and for entire album.
2 New Smart Suggestions option : This feature will appear occasionally.
Know how it works.
If you are viewing someone else’s shared album and Google thinks you could add a relevant photo to that album, this new smart suggestion will tell you to add a photos in that or to give and suggestions for that album. It’s probably one of those features which will pop up only when Google find that you are an right person to choose.
3 Improved Device Folder performance : They have improved an device folder performance.
Download This update’s apk file from below link.
Google Photos APK