The social networking site says it will be experimenting with a way to make adverts on Twitter more useful.
It plans to display promoted content from brands and businesses a user has shown interest in.According to a post on its blog, the company - which allows people to send public messages of up to 140 characters - said: "Users won't see more ads on Twitter, but they may see better ones".
It said the move - which technology experts say will bring Twitter in line with other social networking sites that tailor adverts - will be trialled in the US "soon".
A spokesman said: "The ad pilot is US-only and we don't have a timescale for roll-out more widely."
Twitter will tailor adverts to the individual user's browsing information - although their personal email addresses will be unreadable, Twitter said.
It also confirmed it will not receive browser-related information from its ad partners for tailoring adverts if users have DNT (Do Not Track) technology enabled.