When you're moving around with a device (like a laptop, smartphone, or tablet) that's connected to a wireless network, the device periodically checks for nearby networks to see if there's a stronger or possibly better network available. This process is known as roaming. The goal is to maintain a stable and strong connection, automatically switching to a better network if necessary.

Suitable for highly mobile environments where you're frequently moving through areas with varying signal strengths. This setting helps ensure you stay connected to the strongest available signal.