To display the category name of the single blog post on the top header instead of just showing ‘Blog’, pls modify the line number 554 of {theme folder}/framework/functions/utility-functions.php file to –
elseif (is_singular('post')) {
$category = get_the_category();
echo '' . $category[0]->cat_name . '
';
/*echo '' . $tagline . '
';*/
}
You can override the function mo_populate_tagline() with the above change in the child theme functions.php as well if you do not want to modify the core files of the theme.