Tweets from many different users, who are not necessarily following each other on Twitter, can be connected via a HASHTAG. A hashtag is recognized and created by using the “#” sign on Twitter.
Storify, is a tool, that allows you to create a story from individual tweets by searching a #hashtag.
Take a look at the storyfied #BAGIN2014 hashtag to get an idea of what was going on at the first day of the GIN conference.