If you don’t know how to use Twitter, you can start learning HERE.
If you just want a lesson in using hashtags (#) go HERE.
The home page of Tweetchat.com has simple 1, 2, 3 instructions on how to use it HERE.
If you follow a hashtag on Tweetchat.com, it will automatically update your feed every time someone posts using the hashtag in their tweet.
If you participate from your tweets will have the hashtag automatically added to the end of them, so you don’t have to remember to do it yourself.
Another way to follow is to use the search option on Twitter like this one HERE. In my experience, this does not refresh as quickly as Tweetchat, so you may see more of a lag in comments.
Twitter clients Tweetdeck or Hootsuite are not as efficient refreshing their feed.
For those tweeting from phones, tweet chat works well in a mobile browser.
Any other questions, feel free to contact me and I will try to help.