A Wi-Fi Scanner is a tool used to detect and analyze wireless networks in a given area. It helps users identify available Wi-Fi networks, their signal strength, and other important details like the network's security type and channel. This information can be useful for troubleshooting connectivity issues or optimizing network performance. Many Wi-Fi Scanners are available as software applications for computers and smartphones, making it easy for anyone to access. Some advanced scanners can also provide insights into network congestion and interference, helping users choose the best channel for their Wi-Fi network to ensure a stable connection.