The Miranda v. Arizona case is important because it ruled that:
The police must inform accused people of their rights before seeking a confession.
This ruling is based on the:
Fifth amendment
Explanation:
Deputies and police investigating crimes now have standards to follow thanks to the Miranda v. Arizona verdict, which also serves to deter crime.
Suspects can't be arrested if the police don't tell them about their constitutional rights, like the Fifth Amendment right not to incriminate themselves.