Provision of an on-line marketplace for buyers and sellers of licenses to audio and/or visual content for use in marketing campaigns; Provision of an on-line marketplace of audio and/or visual content available to be licensed for use in marketing campaigns; Software as a service (SAAS) services featuring software for uploading and making audio and/or visual content available for licensing via an on-line marketplace; Software as a service (SAAS) services featuring software for reviewing audio ...