The Sims 4 Digital Deluxe Edition includes:
This is the first Sims 4 expansion, beefier in size than the previous "Outdoor Retreat."
GMG is an authorized Origin retailer and you'll be receiving a product code through GMG immediately after purchase, now that the game is officially released. Screenshot on where to put the coupon code:
After you receive your product code, simply launch Origin and click on "redeem product code" - insert the game code you received from GMG and the expansion will start downloading.
Overview from Lazy Gamer: