An OptiGroup is a collection of campaigns irrespective of channel that you want Optily to optimize together. Typically this will be because the campaigns share a common goal or business objective.
In Optily's Ad Strategy, we suggest 3 OptiGroups, one for each funnel stage. Each OptiGroup is a collection of the campaigns that work together to deliver the specified Optimization Goal. So if you have a different strategy, edit the recommended structure and group campaigns together for optimization based on other characteristics like product promotion, location or ad creative.