These are people who not only spend hours on the service engaging with friends, family and brands but look at and, hopefully, click on advertising.

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The three billionaire musketeers are good friends and not only work together but also spent most of their (very limited) spare time together.

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When I say among friends, I mean not only the distinguished guests that are from around the world who have joined us in this conference.

WHITEHOUSE: The White House

In other words, if your profile and the photos you have uploaded to it are only accessible to people on your friends list, Facebook says it does not have the right to show those photos to anyone outside your friends list.

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Not only does the application want to know all about you, it also wants to know who all of your friends are, along with their religious and political beliefs.

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