In WordPress, there is an admin bar at the top of the site backend and frontend when logged in. This toolbar holds information and shortcuts to useful backend tasks. An admin may have a full bar of options, while a subscriber may only see one or two things, usually including their account and the WordPress logo.

You may want to hide this from the general user just to give them a cleaner experience, especially on the frontend.

Place the following code anywhere in your child theme’s functions.php document.

// hide admin bar for anyone not an admin
function remove_admin_bar() {
    if (!current_user_can('administrator') && !is_admin()) {
      show_admin_bar(false);
    }
}
add_action('after_setup_theme', 'remove_admin_bar');