The advantages of using virtual machines include efficient resource allocation, isolation, and scalability. Virtual machines allow multiple operating systems to run simultaneously on a single physical machine, optimizing hardware usage and reducing costs. They also provide a layer of isolation, making it safer to run potentially harmful applications without affecting the host system. Additionally, virtual machines can be easily backed up, cloned, and migrated, facilitating disaster recovery and application testing. Overall, this technology enhances flexibility and efficiency in managing IT resources.