The company, which sells "promoted tweets" and advertises "promoted accounts" for customers, will now include both features on its mobile applications timeline, it said in a blogpost on Tuesday.

Until now, "promoted trends" and "promoted tweets" were included only on a search page when accessing Twitter on the iPhone or Android.

As a growing number of users switch to mobile phones and tablets as their primary method of accessing the Internet, ad-supported Web services are turning to mobile screens. About 55 percent of Twitter's over 100 million monthly active users access its service over a mobile phone.

Facebook, which gets almost 85 percent of its revenue from advertising on its website, is also reported to have been testing advertising for its mobile app.

San Francisco-based Twitter has already begun displaying promoted accounts for its iPhone and Twitter clients and will start publishing promoted tweets in coming weeks.

Initially, only a small number of users will see promoted tweets on their mobile phones, Twitter said on it blogpost.

Since 2010, Twitter's in-house sales staff has sold "promoted tweets" to large businesses on a case-by-case basis, but this month, the company launched a similar service to allow small businesses to buy and place ads on the online messaging platform.

The company's service lets people send 140-character messages, or tweets, to groups of followers. Twitter has more than 100 million active users and a valuation topping $8 billion, even though it does not yet have a significant money-making model.

(Reporting by Himank Sharma in Bangalore)

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