Let's hypothesize for a minute, why a technology giant, like Google cares about user photos?
Their machine learning systems are unmatched.
In order for machine learning to be more effective they need to be given context. What's the missing key for photos? People. What happens when you add in an authenticated Google user, who they already know everything about due to using other G services (mail, search, adwords) to that machine learning with photos?
My assumption would be they can simply learn more about you. Personalization is ad money, nothing more.
Their machine learning systems are unmatched. In order for machine learning to be more effective they need to be given context. What's the missing key for photos? People. What happens when you add in an authenticated Google user, who they already know everything about due to using other G services (mail, search, adwords) to that machine learning with photos?
My assumption would be they can simply learn more about you. Personalization is ad money, nothing more.