JL;DR

Chad Gadya is a traditional cumulative song sung at the end of the Passover Seder. It features a chain of events triggered by the purchase of a young goat for two Zuzim, symbolizing various themes of pursuit, catch, and ultimate redemption. Each stanza builds upon the previous one, leading to a final resolution often interpreted as a metaphor for Jewish history and divine justice. The song is unique for its repetitive style and inclusion of various characters and animals, making it a memorable and engaging conclusion to the Seder.