"When you see your friends and parents lighting up, that has a powerful impact, " says Jamie Penn.

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The latter now means that when you receive or place calls to your friends, you automatically see their Facebook profile picture, latest status update, and birthday if it's coming up soon.

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When you see that happen in your circle of friends or publicly (thanks to the Internet), usually your response includes thinking that the guy has stopped being a man, is overcompensating for something else, and probably should stop crying and get over it.

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If you invite friends to the network you can see when they are online, what pages they are surfing, and you can even jump onto the same page and send them a chat message about it.

BBC: Me.Dium.com