Given this code snippet in functions.php, what will happen?

Given this code snippet in functions.php, what will happen?

function load_assets() {
  wp_enqueue_style('main-style', get_stylesheet_uri());
  wp_enqueue_script('main-script', get_template_directory_uri() . '/js/main.js', array('jquery'), null, true);
}
add_action('wp_enqueue_scripts', 'load_assets');