Soma is a special drink that people used to make a very, very long time ago. It was mostly used in ancient Indian religious ceremonies. Basically, it's like a juice that's made from a plant called "Soma" (which doesn't exist anymore) mixed with other things like honey or spices.
Now, the important thing about this drink is that people believed it had magical powers. They thought that drinking Soma would make them feel happier, healthier, and even make them live longer! It was kind of like a magical medicine that people would use during special ceremonies to connect with their gods.
Unfortunately, we don't really know exactly what the plant Soma was, or how to make the drink anymore. People have been trying to figure it out for a long time but we just don't have enough information. So, even though it was really important in the past, Soma is just a mystery now.