Instant upload automatically puts every photo and video that you take using your smartphone into a private album within Google+. From there, you can choose what to share (and importantly what not to share) with your circles. It’s a pretty great feature that takes away the pain of having to upload every single photo you take manually to the network.
Google+ product manager Anton Lopyrev elaborates in a Google+ post:
Instant Upload is only active while the Google+ iOS app is open, and for a brief period after you close it. Re-opening the Google+ app resumes your photo & video uploads exactly where they left off.
Google aired a new commercial during the Grammys on Sunday night called “New Dad.” The ad specifically touted Google+’s instant upload feature, making the case that it will help you “never lose a memory.” This month the Google+ iOS app is getting an upgrade to include a feature that’s been the most demanded by users – instant upload.