Code-Snippets-Functions/Execute a function on a child site/All in One SEO Pack/add-to-title-string.txt

add_filter( 'aioseo_title', 'aioseo_filter_title' );
function aioseo_filter_title( $title ) {
   if ( is_singular() ) {
      return $title . 'some additional title content here';
   }
   return $title;
}