This is a custom dimension of the type "Content Group". In this dimension, static information on a page is collected. "Bounce Pages" means that only pages are taken into consideration which were the only pages viewed in a visit.
The "-" classifies all pages that are not assigned to a content group.
We cannot provide further information here, as each content group is configured in your Mapp Intelligence system.
For further questions please contact your Mapp Intelligence administrator.
