Sign in to your Google Ads account.
Click the tools icon , and under “Billing,” select Promotions.
On the "Promotions" page, you'll all promotional codes added to your Google Ads account and the related amounts and statuses, including the following:
“Active”: Reward associated with coupon has been granted.
“Redeemed: currently earning”: Coupon was successfully redeemed, but the spend requirement hasn't been met yet.
“Processing”: Spend requirement has been met and Google’s system is processing the granted reward amount.
“Expired”: Coupon expired after redemption and before the spend requirement was met.
“Invalidated”: Coupon was invalid/invalidated.
We also recommend you check this video where we show you how to check your promo code status on your account.