On the Web: 7 Things You Should Know About Google +1

1. As it stands today, users need to be logged into their Google account to +1 something. (If you don't see +1s yet, sign up for Google's experimental search site.) When users click the +1 button, their recommendations show up in their Google public profile. One of the biggest challenges of +1 is that many users don't even know they have a profile — if you have any kind of Google account, you have a profile.