Is it a free license?

Question

css

If the style.css of a Wordpress theme says
/*
Theme Name: Virtue
Theme URI: kadencethemes.com/product/virtue-free-theme
Description: The Virtue theme is extremely versatile with tons of options, easy to customize and loaded with great features. The clean modern design is built with html5 and css3 and uses the powerful responsive framework from Bootstrap to be a fully responsive and mobile friendly. It's fully ecommerce (Woocommerce) ready with all the tools you need to design an awesome online store. The versatile design is perfect for any kind of business, online store, portfolio or personal site. We built Virtue with a powerful options panel where you can set things like your home layout, sliders, custom fonts, and completely customize your look without writing any CSS. You are going to love how easy this theme is to work with. Virtue was built and designed by Kadence Themes .
Version: 2.6.0
Author: Kadence Themes
Author URI: kadencethemes.com
Tags: responsive-layout, two-columns, one-column, custom-colors, custom-header, custom-menu, featured-images, translation-ready, theme-options, photoblogging
Text Domain: virtue
License: GNU General Public License v3.0
License URI: www.gnu.org/licenses/gpl.html
*/
does this mean that the WordPress template is free and you can change its code as you like?

Answer 1

Yes, but if you change it, you must make all changes available. The license stipulates that derivative works will have the same freedoms as the original work.
And yes, use for commercial purposes, resell - everything is welcome.