Welcome to Rustfinity, we're glad you've decided to improve your Rust skills. In this challenge, you will be asked to write a simple function to return the string slice "Hello, World!".

String slices are references to a sequence of bytes stored in memory, primarily used to store text data. In Rust, string slices are written as &str. Adding 'static to &str indicates that the string slice is stored in the program's memory for its entire program's lifetime.

In this challenge, you will write a function that returns a string slice of type &'static str with the value "Hello, World!".

In Rust, there are two ways to return values from functions. The first way is to use the return keyword, followed by the value you want to return, and then a semicolon. The second way is to omit the semicolon and the return keyword; the value will then be returned implicitly.

Here's an example of a function that returns a string slice:

fn returns_text() -> &'static str {
  "Some, text!"
}

Or using the return keyword:

fn returns_text() -> &'static str {
  return "Some, text!";
}