The new service is a progression from a current feature which gives users suggestions on who to follow based on a user's individual histories on the micro-blogging website.
In a statement, the company explained: "We know that people want a relevant Twitter timeline.
"One way to do this is by unfollowing people they don't engage with regularly. We ran an incredibly limited test to surface accounts that people were not engaging with to check if they'd like to unfollow them."
The test - which is said to have affected just a fraction of the user base - has already concluded.
While some people may see the move as the website trying to limit the visibility of some users - after US president Donald Trump accused Twitter of "shadow banning" - but the company has denied this.
It added that "behavioral ranking doesn't make judgments based on political views or the substance of tweets".