SNR vs Signal Strength for digital throughput
"Signal Strength": I believe you are referring to the RSSI value, which is the Received Signal Strength Indicator this value is typically shown as a negative dBm value. RSSI is the measurement of power in an RF signal, the more power in an RF signal the better the connection quality is. It’s typically best practice to have the SNR value 20 to 25 dB’s away from the RSSI value. Please see the figure below, where it's also taken into account the Noise Level (-50 - (-96) = +46):