Currently, there are 6 available (permission) roles on the SMP. These are viewers, players, actors, story writers and moderators. Viewers are simply anyone on the Discord server who is only there for the content, players are anyone who play on the server and has not been banned, actors are those who have given permission to be used in the plot and are made aware of major plot points they will be involved in, story writers are those who come up with ideas for how the plot will progress and are considered the main actors and moderators are those who are trusted enough to be on the server by themselves and have access to plugins to help fix any issues that go on involving people breaking the rules. Members can apply for a higher up role through the application form
Previously, there were only 4 tiers of members on the SMP where each tier up gets more freedom to interact with the SMP, but also more rules. These tiers were viewers, players, moderators and content creators. Content creators are no longer considered a role but just a tag to show you publish content on the SMP.