IEEE 802.11 is a fancy way of describing a set of rules for how computers and other devices can communicate with each other using a wireless connection, like WiFi.
It's kind of like a game of catch, but instead of throwing a ball, you're sending and receiving data through the airwaves. These rules make sure that everyone playing the game follows the same set of instructions, so they can all understand each other and no one gets left out.
These rules cover things like how fast you can throw the ball, how far away you can be from each other, and how many people can play at once. They also cover security measures to make sure that no one else can intercept the ball while you're playing.
Overall, IEEE 802.11 is just a fancy name for the set of instructions that allow devices to talk to each other wirelessly, whether it's your phone, your computer, or your smart TV.