What is remand and reverse?

Answer 1

I believe the question concerns "reverse and remand." A court of higher jurisdiction heard an appeal of a lower court matter and decided the lower court was wrong in some way. The higher court reverses the decision made by the lower court. The higher court then remands (sends) the matter back to the lower court to hear or decide the case according to the instructions of the higher court.

Answer 2

When a case is "reversed", it means the former judgement is considered void. If it were a criminal conviction, the defendant's conviction would be overturned.

When a case is "reversed and remanded", the former judgement has been considered void (again); however, the case will then be sent to the lower court for a retrial. The retrial will include the new information; however, the (second) result may be the same as the first.