What does all conference mean?

Answer 1

All conference teams are composed of all the best players at each posistion throughout the conference. Just like an all star team.

Answer 2

Like if you make all conference team, you are one of the best players in your whole conference. It's like they make a single team out of all the players in a conference

Answer 3

It means the coaches in your conference believe if they were to select a team of only the best players from their conference then you would be one.