How does WiFi work?

You ask: How wifi work?

Wifi is like drum talk, but drum Caveman cannot hear. Box in cave — router — take message from internet wire and turn message into radio waves. Radio waves same family as light, but stretched long, so they pass through wall like sound pass through hide. Router wiggle wave in special pattern, more than two billion wiggles each heartbeat — wiggle this way mean one, wiggle that way mean zero. All pictures, all words are just long strings of ones and zeros. Caveman phone has tiny metal listener, antenna. Antenna feel wave wiggles, turn them back into ones and zeros, then into cat picture. Phone shout back same way, so talk go both directions. Waves get weak far from router, like drum sound faint across valley — that why wifi die in far corner of cave. Cave wisdom: wifi just very fast invisible drum beat between two boxes.