Pinterest occasionally runs marketing offers that you can apply to your advertiser account. If you're eligible for a credit (a promotional amount that is added to your account to spend on ads) or you applied for a voucher (a discount towards billing), you can see this offer in your account.
Be mindful that credits and vouchers are not automatically applied to your account. You need to redeem a credit or a voucher to activate them. In addition, all credits and vouchers have an expiry date, after which the offer will no longer apply.
You can view your active and expired offers, and their terms, validity period and expiry dates, on the Promotions page.
Log in to your
Click Ads at the top of your screen, then click Billing
Click Promotions from the left-side navigation
If your ad spend meets the conditions of the offer, the voucher will be applied to your next bill.