TOS refers to Amazon's Terms of Service, which is a set of regulations and agreements on the Amazon platform, detailing the rules and terms that users need to follow when using the various services provided by Amazon. TOS usually includes the following:

1. User rights and responsibilities: TOS clarifies the rights and responsibilities of users when using Amazon services, including account security, protection of personal data, prohibited behaviors, etc.

2. Transaction rules: TOS stipulates the rules that users need to follow when conducting transactions, including communication with other users, order and payment processes, refunds and after-sales service, etc.

3. Intellectual property protection: TOS details Amazon's intellectual property protection policy, including measures to deal with infringements and corresponding complaint processes.

4. Advertising and promotion: TOS stipulates the rules and restrictions for users when using Amazon's advertising services, including requirements for advertising placement, penalties for violations, etc.

5. Penalties for violations: TOS stipulates relevant penalties for users who violate the terms, including limiting or closing accounts, canceling transactions, refunds, and possible legal proceedings.

Before using the Amazon platform for shopping, selling, or other activities, users need to carefully read and understand Amazon's Terms of Service. By complying with the Terms of Service, users can better utilize the various services provided by Amazon and have a better user experience.