A more thorough explanation:

A no-merit brief, also known as an Anders brief, is a document filed by a court-appointed defense attorney who believes that an appeal is frivolous and wants to withdraw from the case. In this brief, the attorney must identify anything in the record that might arguably support the appeal. The court then decides whether the appeal is frivolous and whether the attorney should be allowed to withdraw.

For example, if a defendant is convicted of a crime and their court-appointed attorney believes that there are no valid grounds for an appeal, they may file a no-merit brief. In this brief, the attorney must explain why they believe the appeal is frivolous and identify any potential arguments that could be made in favor of the appeal.

The purpose of a no-merit brief is to ensure that defendants receive adequate representation, even if their attorney believes that their case has no merit. By requiring the attorney to identify potential arguments in favor of the appeal, the court can ensure that the defendant's rights are protected and that the appeal is not dismissed without proper consideration.