If your router doesn’t include enough ethernet ports for your liking, this 5-port gigabit switch from NETGEAR is a cheap and easy way to solve that, and $12 (after clipping the $3 coupon) is the best price we’ve ever seen.
Want lower latency for Fortnite? More reliable 4K Netflix streaming? A better-performing Plex server? Ethernet is the only way to go.