To adhere to global data privacy acts and respect customers' privacy, the retailer should enable terms and conditions functionality within Marketing Cloud, which will allow them to display a custom message and a checkbox for customers to agree before they can submit a form or join a list. The retailer should also use profile and preference center functionality for Marketing Cloud Email Studio, which will allow them to capture consent and opt-in confirmation from customers, as well as provide them with options to manage their email preferences and unsubscribe.
Reference:
[Terms and Conditions]
[Profile and Preference Centers]