Distribution Fees

Fees paid out of fund assets to cover marketing and selling fund shares. These fees may cover advertising costs, compensating brokers and others who sell fund shares, payments for printing and mailing prospectuses to new investors, and providing sales literature to prospective investors. Distribution fees sometimes are referred to as "12b-1 fees."

Source: http://investor.gov/glossary/glossary_terms/distribution-fees#.Us2rxWRDuEg