A more thorough explanation:

An advisory committee is a group of people who are formed to give suggestions or advice to another group or an official. There are different types of advisory committees, but one example is the five committees responsible for proposing amendments to federal court rules. These five committees are responsible for appellate, bankruptcy, civil, criminal, and evidence rules.

For instance, the Advisory Committee on Civil Rules is responsible for proposing changes to the rules that govern civil cases in federal courts. This committee is made up of judges, lawyers, and law professors who have expertise in civil litigation. They review the current rules and make recommendations for changes that will improve the efficiency and fairness of the civil litigation process.

Another example is the Advisory Committee on Evidence Rules, which is responsible for proposing changes to the rules of evidence that apply in federal court cases. This committee is made up of legal experts who have knowledge of the rules of evidence and how they are applied in practice. They review the current rules and make recommendations for changes that will improve the accuracy and reliability of evidence presented in court.

These examples illustrate how advisory committees work to provide guidance and recommendations to other groups or officials. They are made up of experts in their respective fields who have the knowledge and experience to make informed suggestions for improvements to the rules and procedures that govern legal proceedings.