Google has finally unveiled Google+, the company’s top secret social layer that turns all of the search engine into one giant social network.

Google+, which begins rolling out a very limited field test on Tuesday, is the culmination of a year-long project led by Vic Gundotra, Google’s senior vice president of social. The project, which has been delayed several times, constitutes Google’s answer to Facebook.

The search giant’s new social project will be omnipresent on its products, thanks to a complete redesign of the navigation bar. The familiar gray strip at the top of every Google page will turn black, and come with several new options for accessing your Google+ profile, viewing notifications and instantly sharing content. The notification system is similar to how Facebook handles notifications, complete with a red number that increases with each additional notice.