A campaign groups everything that belongs to one launch, including its dates, goal, budget and the things you promote with it. It's useful when you need to find out whether a launch paid for itself.
These are the main things Campaigns covers in Litestore.
Litestore adds up the campaign's paid orders and subtracts refunds.
Litestore counts the orders attributed to the campaign.
Litestore adds up the commission those orders earned for collabs.
These are the steps you follow in the admin. The guide explains each one.
The help center covers every screen and setting.