When you add an exercise you choose a style, and the choice decides whether you are describing one movement or a group of them performed together. Most coaches use Conventional for almost everything and never need the other. It is worth knowing what the other is for.
Conventional
Workout Titan Coaching describes it as ideal for conventional exercises such as multiset routines. One movement, a number of sets, a rep or time target, a rest period. Back squat, 4 sets of 6, 3 minutes rest.
This is the right choice unless you specifically need the other one. It reads most clearly to the client and it is the simplest thing to log against.
Versatile
Described as ideal for advanced methods like supersets, tri-sets and cluster sets. Rather than one movement, you build a collection of rows held together under one heading. Add a row per movement, and delete any rows you do not need.
That heading is the Exercise system title, described as a label for the included exercise collection. It is what your client sees above the group, so name it in a way that signals how it should be performed: "Superset A", "Push tri-set", "Cluster 5x2".
Which to reach for
The question to ask is whether the movements have to be performed together to make sense. Two exercises that happen to sit next to each other in the workout are two Conventional exercises. Two exercises where the client alternates between them without resting are one Versatile group. Putting them in as separate Conventional entries loses exactly the information that makes it a superset.
The same logic applies to a cluster set, where the rest is inside the set rather than after it. Described as a plain multiset exercise, that intent disappears.
A caution about over-using it
Versatile groups are denser to read on a phone in a gym. A whole workout built out of them is harder for a client to follow than the same workout written conventionally, and harder for them to log against. Use it where the method genuinely requires it, not as the default because it looks more sophisticated.
If a client keeps asking how to perform something, the style is usually the reason: either a group that should have been separate exercises, or separate exercises that should have been a group.