For those unfamiliar with the term, basically it means that Google is testing the Android 4.4.3 build outside of the core Android team, meaning that it could be tested by others working at Google to get their feedback and to see if there might be some major bugs that have yet to be spotted and squashed.
No word on when exactly will Google push out the release to the public, but Android Police speculates that it could be in the next few weeks, which basically means you should not be holding your breath. There’s also no telling as to what exactly will Google include in the Android 4.4.3 update, but given that the Nexus 5’s camera issue has yet to be addressed, presumably that will be one of the fixes we can look forward to.
It is also likely that the update could include the new parking feature that we reported on yesterday. It was revealed in an APK teardown that Google Now could be getting some new cards which could help you remember where you parked your car. Considering we don’t have that feature now, perhaps it could be included in the next Android update. Either way we’ll keep our eyes peeled for more info, so do check back with us at a later date for the details.