Okay kiddo, let me explain an important case called United States v. Place. This case was about a man named Place who was traveling on an airplane with his suitcase. The police suspected that the suitcase had drugs in it, but they didn't have a warrant to search it.
So what did the police do? They took the suitcase away from Place and held it for a little while until they got a drug-sniffing dog. This dog was trained to smell for drugs and it alerted the police that there were drugs in the suitcase. The police then searched the suitcase and found drugs.
But Place didn't think that what the police did was fair. He argued that taking his suitcase without a warrant and holding it while they waited for the drug dog was illegal. He said that it violated his Fourth Amendment right against unreasonable searches and seizures.
The case went all the way to the Supreme Court, and the justices had to decide whether or not what the police did was legal. In the end, they ruled that it was okay for the police to hold the suitcase while they waited for the drug dog. They said that the short amount of time that the police held the suitcase was not a violation of Place's Fourth Amendment rights.
So basically, United States v. Place was an important case because it helped define when it is okay for the police to search someone's belongings without a warrant. The Supreme Court ruled that if the police have a strong suspicion that someone is carrying drugs, they can briefly detain their belongings and use a drug-sniffing dog to confirm their suspicion, without violating the Fourth Amendment.