Twitter has launched a new feature recently, called as suggestions for you which would suggest some people whom you should follow based on your interest and your tweets. The algorithms in this feature, built by our user relevance team, suggest people you don’t currently follow that you may find interesting. The suggestions are based on several factors, including people you follow and the people they follow. You’ll see these suggestions on Twitter.com and the Find People section. If you like a suggestion, click "follow"; if you don’t, click "hide," and It will try not to suggest that user again.
In addition, you will begin to see recommendations for similar users when you view another account’s profile. If you’re interested in a particular user, you might be interested in these other accounts as well.
In order see all these suggestions for your twitter profile, login to your twitter id profile in any internet browser and then click Find People you will see the tab saying Suggestions for you where you will see all these new suggestions.
Note: I just found this twitter feature quite buggy, as it suggested me to follow some id I was already following, kind of weird. Do let us know if you encounter any experience like this.
[ Source – Twitter Official Blog ]
Update: You will also some who to follow suggestions on your twitter profile page as shown in the image below.