Once upon a time, a guy named Buddha taught people how to live a good life and be happy. He had lots of followers who listened to him and learned from him. After Buddha died, his followers wanted to make sure his teachings were remembered correctly and kept alive.
So, they got together in big meetings called councils. At these meetings, they talked about what Buddha said and wrote it down so everyone could remember it. They also talked about how to make sure everyone followed Buddha's teachings.
There were different councils, and they happened at different times. Sometimes, people disagreed about what Buddha meant or how to follow his teachings. At other times, new teachings or ideas came up, and they had to be talked about and decided if they were right or wrong.
Overall, the Buddhist councils were important meetings where people who followed Buddha's teachings got together to talk, learn, and make sure everyone was following the right path.