A more thorough explanation:

A field stop is a type of police procedure called stop and frisk. It happens when a police officer briefly detains, questions, and searches a person for a concealed weapon if they suspect that the person has committed or is about to commit a crime. This can be done without a warrant or probable cause.

The Supreme Court ruled that the stop and frisk procedure is constitutional in the case of Terry v. Ohio. This ruling allows police officers to conduct a field stop if they have reasonable suspicion that a person is involved in criminal activity.

For example, if a police officer sees a person acting suspiciously near a store that was just robbed, they may conduct a field stop to search for any weapons or stolen items.

Another example is if a police officer sees a person walking around a high-crime area late at night and suspects that they may be carrying a weapon, they may conduct a field stop to ensure public safety.

These examples illustrate how a field stop can be used as a tool for police officers to prevent crime and protect the public. However, it is important to note that the procedure must be conducted within the bounds of the law and with respect for the individual's rights.