> I wouldn't be surprised if it's leveraged to benefit Google's analytics, ...
https://support.google.com/wifi/answer/6246642 has a tl;dr version: "Importantly, the Google Wifi app and your Wifi points do not track the websites you visit or collect the content of any traffic on your network. However, your Wifi points does collect data such as Wi-Fi channel, signal strength, and device types that are relevant to optimize your Wi-Fi performance." and a full explanation of everything it does (or does not) collect, and why.
https://support.google.com/wifi/answer/6246642 has a tl;dr version: "Importantly, the Google Wifi app and your Wifi points do not track the websites you visit or collect the content of any traffic on your network. However, your Wifi points does collect data such as Wi-Fi channel, signal strength, and device types that are relevant to optimize your Wi-Fi performance." and a full explanation of everything it does (or does not) collect, and why.