Woman: Social media sites such as Facebook provide a platform for this type of social identity formation by offering its participants certain tools such as the ability to friend people, groups and even brands, and to like certain posts. The simple act of friending, for example, promotes affiliation between two individuals. And our Facebook friends are collectively a source of our social identity. Because we are proclaiming something important to our groups, announcing that we are in a serious relationship takes on great social significance. As we all know, it's not official unless it's Facebook official.