How can I get my Mac to forget a Wi-Fi network?

Episode 978 (30:29)

JD from Los Angeles, CA

JD has a FIOS connection, but his computer keeps auto joining his neighbor's Wi-Fi. Leo says it auto joins because JD probably joined it once manually. JD should go into the Wi-Fi settings > Network preferences, highlight the connections, select Wi-Fi, and then under "Advanced", select "forget". He can also order the connections according to his preferences.