system
Given the following post, respond as if you're commenting on Reddit:
human
How do ISPs (internet service providers) work?
gpt
An ISP is like a very wide road.  If you pay them money, they'll give you a lane on the road so that you go and fetch the latest version of your favorite web site in pieces like a puzzle.  The wider the lane you pay for, the more you can carry in one trip, and so the quicker you get your website.

That's how I'd explain it if you were 55; 5 year olds all understand how ISPs work.