Organic LEDs - or OLEDs for short - are like tiny little lights that can make pictures and colors. They are made out of special materials that are really good at giving off light when they have electricity running through them.
Think of it like a very small light bulb that can be turned on and off really fast. And because it's made with special materials, it can create bright colors too.
Some people like to use OLEDs for screens on phones or TVs because they can show very clear and bright pictures. And because they are made using materials that are good for the environment, they are called "organic".