When a person appears before an appellate court, their goal is to persuade the judge to reverse a decision that was made by a previous court. In the United States, anyone convicted of a crime is guaranteed at least one appeal. If you ask for an appeal, a court has to look at the case that you are making to see if the previous decision made should be upheld or overturned.
It is important that in an appeal you have a solid appellate brief to help the judge understand new details of the case. In a recent case where the NLPA was employed for brief writing, the brief presented was key in convincing the judge to make decisions on the side of the client. Having a good brief created an opportunity for this client to seek justice in their case.