Opt-out is the opposite of opt-in, which are both typically implemented using a consent management platform. Opt-out refers to the practice of allowing users to unsubscribe or decline to receive communications or services from a business or organization. In the context of online advertising, opt-out typically involves providing the user with an easy and convenient way to stop receiving marketing or promotional messages from the advertiser. Opt-out is an important part of an advertiser's marketing strategy, as it can help to ensure that the user's preferences and interests are respected, and that communications and services are only delivered to users who have explicitly agreed to receive them. Opt-out is also beneficial for users, as it can provide more control and transparency over the communications and services that they receive.