You have a Mesh Wi-Fi system or multiple APs and your laptop stays connected to the distant router downstairs while you are sitting next to the upstairs node. Turn it DOWN if:
A balance for devices that move occasionally but stay within a primary zone. Medium (Default): The "Goldilocks" zone for most laptops and smartphones. Medium-High: what is roaming aggressiveness in wifi
By setting roaming aggressiveness to high, you force the device to let go of the weak signal and look for a new one. 6. Other Factors Affecting Roaming You have a Mesh Wi-Fi system or multiple