If you use Twitter actively, it almost inevitably becomes unwieldy. It needs a way to only show us the stuff we need to see. Discover is an interestingness surfacing tool that looks at the signals you give Twitter -- things like who you follow and which tweets you interact with -- to determine what to show you. Yet when you click the Discover tab and start scrolling, you'll see lots of updates from people and organizations you don't follow. While it is finding some things from your own timeline you may have missed, far more of what it brings to light are tweets that you would not otherwise have seen at all. In simple terms, it's adding tweets to your reading list, when what it should be doing is taking tweets away.
