4pl services refer to fourth-party logistics providers, which offer comprehensive supply chain management solutions. Unlike 3PL (third-party logistics) providers, who focus on physical logistics such as warehousing and shipping, 4PLs manage the entire supply chain strategy. This can include overseeing other 3PLs, optimizing logistics processes, and coordinating everything from procurement to delivery. 4PL services are ideal for companies looking to outsource their logistics operations and streamline their supply chain management.