What are the benefits of using Multiple Campaigns?

Multiple Campaigns feature has several benefits:

1. You can evaluate the effectiveness of your campaigns without losing the analytics associated with the Campaign. Switch to the Campaign that is most effective.
2. You can have multiple campaigns running so that each campaign is associated with a different product. For example, in Portion of Sales Campaigns, you can have a different percentage of sales applied to different products and each with their own unique text.