This page explains how to get online via a wireless connection with your Nintendo Switch.
Nintendo Wi-Fi Connection - Wikipedia
Nintendo Switch: Registration is Required for this Network? Public Wifi (Hotels, Airports, etc)
How to Access the Hidden Nintendo Switch Browser
Why does the Nintendo Switch not have an option for wired connection? - Quora
Internet connection, Nintendo Switch Support
Nintendo Switch WiFi / Internet Connection Issues : Reasons & 7 Fixes / Solutions
How to Connect a Phone or Tablet to the Internet Using an Ethernet Cable
Internet connection (with a wired connection), Nintendo Switch Support
How to Connect Switch to Hotel Wi-Fi - Alvaro Trigo's Blog
How to Set Up Bluetooth Audio on a Nintendo Switch -- and Why it's Worth Doing - CNET
Your Nintendo Switch Won't Connect to the Internet? Here's What to Do
How to Connect to the Internet Using a Wired Connection, Nintendo Switch, Support