What are the implications of a brief stop by a police officer on a street?

"The Fourth Amendment prohibits 'unreasonable searches and seizures' by the Government, and its protections extend to brief investigatory stops of persons or vehicles that fall short of traditional arrest." United States v. Arvizu, 534 U.S. 266, 273 (2002); Ramirez v. City

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of Buena Park, 560 F.3d 1012, 1020-21 (9th Cir. 2009). Under the Fourth Amendment, a "detention or seizure of a person occurs when the officer, by means of physical force or show of authority, has in some way restrained the liberty of a citizen." United States v. Orman, 486 F.3d 1170, 1175 (9th Cir. 2007); Desyllas v. Bernstine, 351 F.3d 934, 940 (9th Cir. 2003).