Within the SAP Customer Data Platform, you can perform various actions on a segment. Specifically, you can activate a segment to make it available for use in campaigns and other marketing activities. Additionally, you have the option to delete a segment if it is no longer needed or relevant. Activation is a crucial step to ensure that the segment is operational, while deletion helps maintain the organization and efficiency of your segment management by removing obsolete or unused segments.

References = This response is based on the official SAP Customer Data Platform documentation, which provides detailed guidance on managing segments, including the ability to activate and delete them12.