To activate, you need the game Overwatch. Only one such key can be activated on one account.
After paying for the goods, you instantly get the code (without regional restrictions), with which you can get 5 containers in the Overwatch game. Each container contains four random items.
1. Log in to your Battle.net account and enter the purchased code here: https://eu.battle.net/account/management/claim-code.html
2. Follow the instructions on the screen.