Title: How does Twitter make money? - BBC News
Headings: How does Twitter make money?
How does Twitter make money?
'Native' marketing
Using the 'firehose'
International users

Content: 'Native' marketing
Almost all of Twitter's revenue - about 85% of it - comes from advertising on its site. There are three main ways for a company or an individual to advertise on Twitter: by promoting a tweet that will appear in people's timelines, promoting a whole account, or promoting a trend. Only last week Twitter changed the way posts are displayed in the timeline feed, allowing photos and video previews to appear without needing to click on a link - a move some analysts say will help advertisers to better show off their content. Twitter tends to charge its advertisers according to the amount of interaction their content generates. A budget is usually set at the start of the campaign and then the advertiser pays per click or per retweet. It also has a "bidding" system in which advertisers compete with each other to have their content appear in a particular space. "One of the advantages of Twitter for marketers over traditional display advertising is they have worked really hard to make sure that advertising on Twitter is not interruptive," says Lara O'Reilly, senior reporter at Marketing Week. media caption
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Anything that disrupts the user experience might reduce engagement from users, which in turn can put off advertisers, Ms O'Reilly says. "It's not a flashy banner that gets in the way of something.