A Wi-Fi system allows devices to connect to the internet wirelessly. It uses radio waves to transmit data between a router and various devices like smartphones, laptops, and tablets. This technology enables users to access the internet without the need for physical cables, providing convenience and mobility. The core components of a Wi-Fi system include the router, which connects to the internet, and the access points that extend the network's range. Wi-Fi operates on different frequency bands, primarily 2.4 GHz and 5 GHz, allowing for varying speeds and coverage areas to suit different needs.