Managing a multitude of campaign assets (banners, texts, products etc.) and reusing them across different pages can require much manual effort from marketing and content teams. 

The Campaign Manager extension allows you to create, manage and schedule campaigns and rich banners in one single place, with comprehensive editing options. You maintain all campaign elements in one place and you can also reuse entire campaigns. 

Each campaign you create is essentially a component you can then use in a page. While content apps focus on managing structured content, the Campaign Manager provides an authoring experience similar to that of the Pages editor, with visual feedback and layout capabilities.