You can configure this feature in the account by following this link.

With campaigns you are able to define specific time periods where your merchandising features are getting enabled and disabled automatically. Merchandising features that can bei associated with campaigns are:

• Promotions
• Landingpages
• Product pushing
• Product Placements
• Search-Concepts

This might be very useful to you for recurring events (like carneval, christmas-time, etc.), where you want to have special merchandising features to be enabled.

• Name: Name of the campaign (users won't see this).
• From: Here you can specify the first day of your campaign. Related merchandising features will be activated after this day.
• Till: Here you can specify the last day of your campaign. Related merchandising features will be disabled after this day.