A Wi-Fi system is a technology that 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 enables users to access the internet without the need for physical cables, providing convenience and mobility. Typically, a Wi-Fi system consists of a modem that connects to the internet service provider and a router that distributes the internet signal throughout a home or office. Many modern systems also include features like mesh networking, which helps eliminate dead zones and improve coverage in larger areas.