Do I need Ethernet for my PC?

I'm curious about the necessity of Ethernet for my personal computer. Could you please explain the importance of Ethernet in a PC setup? I've heard of Wi-Fi as an alternative, but is Ethernet really essential? Could you elaborate on the advantages Ethernet offers compared to Wi-Fi? Also, if I don't have an Ethernet port on my PC, are there any workarounds or alternatives I could consider? I'm trying to understand the best networking option for my PC, and your insights would be greatly appreciated.