What is the source of websites income like twiter, facebook, or another.?

[Shivam]

[Max]

Usually advertisements and micro-transactions.

[Cynthia]

Advertising!!!! Facebook and Instagram also can use any of your posts and/or photos and sell them to advertisers without giving you a penny. People also pay to advertise their companies on Facebook walls in order to get as many views as possible.

Also, each time you like or favorite something, that can be used to produce revenue by selling the information to advertisers.

[Daniel]

Twitter Facebook and All The Sites That Are Free Gets there Income From Advertisements Other People Pay Them Money to Display Ad's on There Site

[srbh]

i think the source of income of these websites are the advertisements that are displayed on that website