To locate a specific access point (AP), the most reliable identifier to view is the BSSID. In 802.11 networks, the BSSID is the radio interface identifier for the AP (typically the AP radio's MAC address). Unlike an SSID, which can be shared across many APs in the same wireless network (especially in an enterprise deployment using the same SSID across multiple APs), the BSSID uniquely distinguishes one AP radio from another. This is critical during an 802.11ax (Wi-Fi 6) migration, where multiple APs may broadcast identical SSIDs and operate on the same channels in different areas.
While RSSI is useful for physically walking toward the strongest signal (a technique used in locating RF sources), RSSI alone does not confirm you are tracking the correct AP-only that you are near an RF transmitter. Channel number also does not uniquely identify the AP because multiple APs can share the same channel (and channels may overlap depending on band and width). SSID similarly is not unique. Therefore, viewing the BSSID on the analyzer (or Wi-Fi analyzer mode) allows the administrator to confirm the exact AP being measured and located.