An electronic flight bag (EFB) is like a special computer or tablet that pilots use to help them fly planes. It has different apps or programs that help the pilots do things like plan their flights, check the weather, communicate with other people on the ground, and read important information.
Instead of carrying heavy bags full of paper books and charts, pilots can use the EFB to access all of that information electronically. They can even make notes on it or highlight important parts, just like you might do with a coloring book!
Overall, an EFB is like a helper for pilots that makes flying easier and safer.