What does 1 Chronicles 24:31 mean?

They cast lots, just like their relatives the priests did, to decide the order of service. Everyone was included, whether they were the oldest or the youngest, the leaders or the rest of the family. 1 Chronicles 24:31 - Modern Text Bible

(This verse shows that the Levites, like the priests, used a fair system to decide who served when, so no one was left out or favored.)