❔ What should web api controller return?

I can return Ok with some json as parameter. Or I can return simple string

For example, I have method in controller:

[HttpGet("movies")]
public string GetMovies()
   => "12 angry men";

[HttpGet("movies")]
public string GetMovies()
   => "12 angry men";

Is it correct to return just a string?

❔ What should web api controller return? - C#