McAfee will provide you a 25 character alphanumeric key while purchasing your product. This Key is nothing but your product activation key. There are 2 ways to purchase McAfee product either through online or offline
Online purchase: While purchasing the product online, you will receive your McAfee product key on your registered email address.
Offline Purchase: If you have purchased a product offline, you will find this key on the backside of the cover or inside the box you will find a sticker. If you are not able to find this product activation key or you have lost it somewhere; don’t worry, the customer care department will support you for this.