As many have noticed, Twitter is constantly testing new features online. Today’s no exception, as Twitter is testing out a Related Tweets system that appears below the tweet box when you visit the unique URL of a tweet. It will present related tweets that share similar words or links. It has yet to appear in any non-web apps, and it’s not viewable to everybody yet, so it’s not quite completed yet. Nonetheless, it’s easy to see many uses for such a software, particularly for advertising companies who could stand to benefit from their social media campaigns appearing in related tweet threads for pertinent topics.