register_sidebar()

Is correct add this function? Only this?

/**
* Add a sidebar.
*/
function wpdocs_theme_slug_widgets_init() {
register_sidebar( array(
‘name’ => __( ‘Main Sidebar’, ‘textdomain’ ),
‘id’ => ‘sidebar-1’,
‘description’ => __( ‘Widgets in this area will be shown on all posts and pages.’, ‘textdomain’ ),
‘before_widget’ => ‘<li id=”%1$s” class=”widget %2$s”>’,
‘after_widget’ => ”,
‘before_title’ => ‘<h2 class=”widgettitle”>’,
‘after_title’ => ‘</h2>’,
) );
}
add_action( ‘widgets_init’, ‘wpdocs_theme_slug_widgets_init’ );