Signal strength measures the intensity of a wireless signal, such as Wi-Fi, Bluetooth, or cellular, received by a device. It indicates how reliably a device can communicate with a network or nearby hardware. Stronger signals ensure faster data transfer, clearer audio, and more responsive interactions, while weaker signals may cause delays or disconnections. Signal strength is displayed numerically or graphically on devices to help users understand connectivity quality. It is used to optimize network performance, improve device placement, and troubleshoot issues—all without collecting personal data. This metric is purely technical, focused on enhancing user experience through efficient, secure, and privacy-respecting communication.