The first time you connect your Pixel to a WiFi network, it automatically remembers information regarding the connection process. Deleting a WiFi network from your cell phone gives the device a chance to relearn how to form this wireless connection.
To Delete A WiFi Network:
To Reconnect To A WiFi Network:
Why this works:
It’s possible that the steps you need to take to join the WiFi network you’re trying to access have changed. One common example of this occurrence is the network’s password changing.
Erasing the WiFi network you’d like to access and then manually reconnecting to it gives your Pixel the opportunity to update the process it undergoes whenever it accesses this WiFi source.
Pro tip:
When you erase your cell phone’s memory of a WiFi network, it will automatically forget the password as well. If the network you’re trying to access is password-protected, you may want to write down the password before erasing it.