Wi-Fi networks are everywhere and we use them every day to connect our iPhones and iPads to the internet. As convenient as they can be, however, if an old Wi-Fi network consistently keeps connecting when you don't want it to, it can be more of a nuisance than anything. Luckily, iOS lets you easily forget any network in just a few taps!
How to get your iPhone or iPad to forget a Wi-Fi network
Remember that you'll only be able to forget a network on an iOS device that you're currently using. If you're using iCloud Keychain, it'll also remove that network from any other iPhones, iPads, and Macs associated with your iCloud ID.