Is wrapping my code with "use strict" a solution for "Please avoid global variables" rejection?

Envato Authors CodeCanyon
1

Hello,
My Javascript project was soft-rejected with the following reason: “please avoid global variables”.

So I decided to wrap my code as follows, so variables are not global anymore.

Is this a proper solution?

(function ( jQuery ) {
'use strict';

var my_variable = "my_value";