A court case that establishes important legal standards or practices is referred to as a landmark case, according to The Law Dictionary. Landmark cases have significant impact on judicial proceedings by prompting the creation of new laws or legal precedents or instigating changes in existing case law.
Landmark cases are often studied because of their historical significance or impact on the interpretation of existing case law, according to The Judicial Learning Center. These cases are typically related to the areas of law concerning individual rights and civil liberties. Landmark cases also establish measurable standards or tests that can be used when applying the ruling to future court proceedings.