What does Nehemiah 10:29 mean?

all of them joined together with their leaders and promised, with a solemn oath, to follow God's law, which was given through Moses, and to obey all the commands, rules, and instructions from the Lord our Master. Nehemiah 10:29 - Modern Text Bible

(The people are making a serious, public promise to live by God's law and follow his commands, showing their dedication.)