Every time you create a new campaign for Instagram, Facebook, or Twitter, a required step is to create a unique hashtag. A unique hashtag helps Roster track and report post engagement.
To ensure Roster can accurately track your campaign the hashtag must meet a couple requirements:
Cannot be a hashtag that was used on previous campaigns
Must be included once on every campaign post and story
Note: Roster only requires one hashtag to track. A campaign manager can add and require additional hashtags.