From what I have seen, the site basically gathers together tweets that come from celebrities and personalities. For example, I came across a lot of tweets by Taylor Swift (yuck!) and Justin Bieber (double yuck!) when checking the site out. Fortunately, there were also tweets by Bill Gates and other industry names around.
In any case, you can filter the results that you are going to see by clicking on any of the tags that are listed on the right-hand side of the main page, underneath the “Popular Topics” banner. And you can also see a list of the top Twitter users right below it.
Other than that, it has to be mentioned that when visualizing the best tweets of the day you can filter them by time, and have only the ones that were posted in the last 3, 6 or 12 hours displayed.
TheTweetWatch.com In Their Own Words
“Your source of important tweets!”
Why TheTweetWatch.com It Might Be A Killer
It will let you know what has been said on the Twitterverse, when, and by whom.