This article explores the operational, financial, and strategic impacts of integrating electric (EV) and hybrid electric vehicles (HEVs) into last-mile delivery fleets within the e-commerce sector. Drawing from professional industry experience and public data, the paper examines key performance metrics such as fuel savings, maintenance costs, infrastructure limitations, and workforce adaptation. It also provides recommendations for delivery fleet operators aiming to implement sustainable logistics practices while maintaining high service efficiency. The research is positioned to support logistics professionals, consultants, and sustainability advocates navigating the transition to clean transportation solutions in commercial delivery environments. Keywords: electric vehicles, hybrid vehicles, last-mile delivery, logistics, sustainability, fleet electrification, e-commerce, operational efficiency, delivery optimization License: CC BY 4.0