A notice of appeal is a formal declaration by a party in a legal proceeding indicating their intention to seek review of a decision made by a lower court or administrative agency. This document must be filed within a specified timeframe and includes key information such as the identity of the parties involved, the decision being appealed, and the grounds for the appeal. Filing a notice of appeal is a crucial step in ensuring that the party's legal rights are preserved and that they can challenge unfavorable decisions.