Sometimes a publisher's ad requests are returned empty, leaving unattractive blank spaces that weaken the integrity of a publication. 

Collapsable ads are a built-in behavior in the Marfeel solution that collapse ad spaces when requests are returned empty to promote an elegant and unblemished user experience.  

Part of the Marfeel offer is providing publishers with sleek and polished mobile sites that strengthen their brand. This isn't only accomplished through the clean and attractive themes and styles provided, but also through features that reinforce the aesthetic integrity of a Marfeelized site.