Benjamin Mayo:

Similar to what has been offered by third-party Twitter clients for sometime, users will be able to hide tweets from specific users or tweets that contain certain keywords from ever appearing in their timeline …

The Twitter app added muting features for notifications at the end of last year. It will shortly roll out the same capabilities to the home timeline.

The Twitter app will also include options to hide users that don’t have a profile photo, cutting down abuse from so-called ‘egg accounts’ which typically retain anonymity by using the default Twitter profile pictures. There will also be settings to mute accounts that use unverified contact information.

I don’t see how people were able to go so long using Twitter’s stock app without mute filters.