Carrying the version number 174.44.1, the update is rolling out over-the-air and is basically a bug-fixing update. So, there are no new features. You will automatically get a notification on your phone once the update is available for you or you can manually trigger the update by going to Settings << About phone << System updates.
Moto G update v174.44.1 change-log:
- Fixed an issue which caused temporary cellular network loss for a small number of customers
- Fixed wallpaper cropping issue
- Resolved USB OTG support for USB drives
- Fixed low call volume as experienced by some users
There is no word on when or whether a similar update is going to be released for dual-SIM or CDMA Moto G version.