Packet Tracer is a network simulation tool developed by Cisco that allows users to design, configure, and troubleshoot virtual networks. It provides a user-friendly interface where individuals can create network topologies using various devices like routers, switches, and computers. This tool is widely used in educational settings to help students learn about networking concepts and protocols. With Packet Tracer, users can simulate real-world networking scenarios without the need for physical hardware. It supports a range of networking technologies, enabling users to practice skills such as IP addressing, routing, and switching. This makes it an essential resource for aspiring network professionals and students preparing for Cisco certifications.