To register your business on the Amazon Ads Partner Network, you should use the Amazon account tied to your business email. If you already have an account that you use to manage advertising, sign in with those credentials. If you don’t have one, it’s a good idea to create a new account specifically for this. For those with a manager account, that’s the best option to register since it allows you to activate any users and advertisers already connected to it. If you manage several accounts, pick the manager account that most accurately represents your business and aligns with how you want it evaluated for advanced partner status.