A CMS is crucial for businesses for several reasons: 1. Efficiency: It streamlines the content creation process, allowing for faster updates and publication. 2. Consistency: Ensures that content is consistent across various platforms, maintaining brand integrity. 3. Scalability: As a business grows, a CMS can handle increased content without a significant increase in effort. 4. Collaboration: Facilitates collaboration among team members by providing tools for workflow management and version control.