Providing a technology platform that enables small and medium-sized businesses (SMBs) operating digital display screens to onboard and make their screen inventory available for participation in aggregated digital out-of-home (DOOH) advertising networks; facilitating access to programmatic advertising marketplaces and supply-side platforms (SSPs) by aggregating and organizing third-party screen inventory for exposure to demand sources; enabling SMBs to generate incremental advertising revenue through participation in programmatic ad transactions.