What is the Talmud? What is considered the most authoritative version of the Talmud?

The Talmud are learnings that came from Rabbinic scholars from thw centers that were created after the destruction of the Second Temple. The Rabbinic scholars studied the Mishnat and wrote commentaries and discussions that created the Talmud. The Talmud that is considered the most authoritative version is the Babylonian Talmu