What are Miranda rights and what is their purpose?

Miranda rights are the rights given to you at the time of arrest (not to be mistaken with being detained) and/or interrogation. Miranda rights are a mixture of the 4th &5th amendments. Miranda v. Arizona is the case that made it so officers must read you your rights during those two situations. Many people recognize it as "you have the right to remain silent, anything you say can and will be used against you in the court of law. You have the right to an attorney, if you can not afford one, we can have one appointed to you. Do you understand that your rights have been read to you?"
Inform the suspect of his constitutional rights