what do i need to change in ?

i need to kknow what more i may need to change in the head do i have to put the page url somewhere or will it find that and so on?? so far i only change the themes name is that all i need to do????
thanks

<?php wp_head(); ?>

    <link rel="alternate" type="application/rss+xml" href="<?php bloginfo('rss2_url'); ?>" title="<?php printf( __( '%s latest posts', 'jonas' ), wp_specialchars( get_bloginfo('name'), 1 ) ); ?>" />
    <link rel="alternate" type="application/rss+xml" href="<?php bloginfo('comments_rss2_url') ?>" title="<?php printf( __( '%s latest comments', 'jonas' ), wp_specialchars( get_bloginfo('name'), 1 ) ); ?>" />
    <link rel="pingback" href="<?php bloginfo('pingback_url'); ?>" />
</head>