Which of the following must be done to fully deploy changes in Copado?

To fully deploy changes in Copado, completing the deployment step is essential. This is because the deployment step is where the actual application of the changes takes place within the target environment. It involves executing the necessary steps that ensure the metadata, configuration, and other related components are effectively moved and implemented in the desired environment.

While other options, such as submitting the deployment for review, updating user tags, and linking profiles to permission sets, may play important roles in the overall deployment process and governance, they do not represent the finalization of the change deployment itself. They are more related to preparation and management of the deployment rather than executing and confirming that the changes have been successfully deployed. Therefore, completing the deployment step is the crucial action that ensures the changes are applied and recognized in the system, making it the correct answer in this context.