One of Android Oreo’s new features is the ability to automatically turn Wi-Fi back on when you’re near a saved network. Essentially, Android will keep track of where each network is located, and will use location services to only turn on Wi-Fi when you’re in range. The feature was available for all devices on the Android O Developer Previews, but was disabled in the final release for the Nexus 5X and 6P:
I miss it since the last two beta, it worked well before.
Tutorial: How to enable Android Oreo’s “Turn on WiFi Automatically” feature on Nexus 5X/6P was written by the awesome team at Android Police.