Connect ipad to internet by ethernet

I've been told I connect to the internet with an ethernet cable. There is this article that says it works, and I've seen many videos of it working for people. https://support.robinpowered.com/hc/en-us/articles/115002123883-Connect-your-iPad-to-a-wired-internet-connection

I get the ethernet connection come up on the ipad, but can't connect to internet. Anyone know what I'm doing wrong? Are the settings I need to change? It is an ipad 7th gen wifi. Thanks