The S-1 said that Twitter has 215 million monthly active users but is not yet profitable. During the first six months of 2013 the company pulled in $253.6 million in revenue, but its net loss increased by 41 percent to $69.3 million. And The company is hoping to raise $1 billion during the IPO, which could value the company at $15 billion.But Twitter is also facing much trouble, among which ramping up global ad sales, fighting spam, and boosting engagement among users in the United States are the main. In addition, Twitter’s business competitors, like Facebook, is also threatening its profits.

As a large part of Twitter’s revenue is from ads, such raising can improve Twitter’s popularity and attract more people. And as mobile devices are becoming a kind of necessity in our daily life, revenue from ads in electronic devices can also make positive benefit to Twitter. Moreover, database which is collected by Twitter is also a large resource. According to different favors analysed from what people posted, Twitter can make specific marketing targets. I think in this way, Twitter can make more profits and hold more market shares in this competitive market.

http://www.theverge.com/2013/10/3/4792166/twitter-ipo-initial-public-offering