If you don't automatically see it when you log in here is what to do:
- Click on "Account Profile", which I've circled
- From there, go to "cashback options" and sign up
This is stackable with the 5% categories so you will get 7% cashback at home improvement stores instead of the regular 6%.
I consider Discover rewards to be worth 1.25x there stated value so 7% is worth 8.75% to me.
Start shopping at Home Depot from Shop Discover and you will get an additional 10% back for a total of 17% back! (10% for Shop Discover + 5% for home improvement store + 2% promotion)
According to the Frequent Miler laboratory, you won't get extra cashback for buying gift cards from Shop Discover, even though this will work through Lowe's.