Google Plus has another update for the photos sharing functionality. This one is related to face recognition. It is totally opt-in thankfully.
You can now allow your friends and relatives on the network to tag you in photos. The process is a bit automated as the service would suggest them your name in photos where it believe you are present.
Google Plus would use facial recognition technology to locate your face in the images.
Google developer Matt Steiner spoke about this feature:
By turning on Find My Face, Google+ can prompt people you know to tag your face when it appears in photos. Of course, you have control over which tags you accept or reject, and you can turn the feature on or off in Google+ settings. (https://plus.google.com/settings/plus)
It is currently being rolled out to all the users of the Google Plus platform.