Hi @Wow_Superb!
In order to use your Pinterest credit, you can run a campaign as usual. The credit you receive will be used to cover the expenses related to your ads. It is discounted on the following bills until the value is all spent. After that, the campaign spend will be billed to your card.
You can learn more about credits and coupons in the following Help Center article.
Let us know if you have any further questions!
