This summary is not the rule. The rule text controls.
Every person involved in a court case must give the court a valid address where they can be reached. This matters when papers need to be delivered through the sheriff or the court clerk instead of being sent directly by the other party.
If you don't provide an address, the sheriff or clerk won't have a way to deliver important documents to you. This could mean you miss deadlines or don't find out about things happening in your case, even though the court and other parties tried to follow the rules.
Basically, this rule puts the responsibility on you to make sure the court has a way to reach you. If your address changes during the case, you should update it so you keep getting the papers you need to see.
