Configuring a single Extended Service Set Identifier (ESSID) allows multiple access points to appear as a single network to Wi-Fi devices, which enables seamless roaming within a network environment. Devices will automatically connect to the AP with the strongest signal using the same SSID. BSSID refers to the unique identifier of each individual access point and is not suitable for seamless integration of multiple APs. Band steering helps to manage the distribution of devices between different frequency bands (e.g., 2.4GHz and 5GHz) but won't assist in seamless connection to multiple access points under the same network identification. Network types such as Mesh or Infrastructure do not focus on SSID configuration and thus are incorrect in this context.