An Ethernet cable lets you physically wire your internet to your computer, rather than having to rely on a more finicky Wi-Fi connection.
Crossover Cable Vs. Straight-Through Ethernet Cable: What's the Difference?
Signs You Need to Replace Your Ethernet Cable
How Well Do You Know Your CATs? Demystifying Ethernet Cable Categories! - SF Cable Blog
Ethernet Cable Identification for Beginners: Reading Print Legends
What are the CAT Ratings for Ethernet?
How to Extend an Ethernet Cable Like a Pro: The Expert Tips and Tricks You Need to Know
networking - Enabling Ethernet connections in my whole household? - Super User
Learn About Types Of Ethernet Cables: UTP, FTP And STP Cable
Simple Ways to Test a LAN Cable: 10 Steps (with Pictures)
Difference between Coaxial vs Ethernet Cable
What Does an Ethernet Cable Look Like?