Profit boost tokens are special price boosts which you can apply to the bet of your choice. For example, you might receive a boost which can only be used on football markets but you can apply the boost to any bet on football.
A good example of this is the below boost from Ladbrokes:
This can be used on a stake of up to £50.
You will get an option on the bet slip to apply this boost. If you find a close match on the OddsMatcher you can then lock in a profit by using the standard calculator in normal mode and changing the back odds to the boosted odds.