The types allow you to visually help you find a unit.
You can select up to three.
They have no impact on percentages, points, bases, etc ...
Use them however you want !
What Role ?
Depending on the game, you have to know the percentage of fighters against shooters. The roles allow you to know this percentage when creating the list.
Build Army Points
Create Option
In role, click on:
You can create an option and also an option pack, in the same way as units by increasing the quantity.
It is useful to give the option the same types, faction, as your affected units, so that you can find them more easily with the find tool.