Imperian has hundreds of help files to help you learn more about the game and how to play.
6.4 GROUPS AND ENTOURAGES
A GROUP is a group of people who are ultimately following the same person. So, if A is following B, and B is following C, then A is ultimately following C. By typing ENTOURAGE or ENT, you will see who is following you. By typing GROUP, you will see who you are following along with who is following you. As someone moves around, those in his entourage will follow him, providing they are able to. In order to follow another player, type FOLLOW <player>. In order to stop following someone, do LOSE <whoever>. This can also be used to lose those who are following you. Please note you cannot follow anything but a player in Imperian, the HELP FOLLOWING file explains why.