Adding metatags to the frontpage (Drupal 7)

Hello abonados

You can use drupal_add_html_head() for adding meta description and meta keywords in header. In Bluemasters theme template.php file, you can call hook_page_alter() for embeding meta. If you want to add meta description and meta keywords in your site then go to your template.php file and paste the code (display below):

function bluemasters_page_alter($page) {
   $meta_description = array(
            '#type' => 'html_tag',
            '#tag' => 'meta',
            '#attributes' => array(
                'name' => 'description',
                'content' =>  'some description here'
            )
   );
   $meta_keywords = array(
            '#type' => 'html_tag',
            '#tag' => 'meta',
            '#attributes' => array(
                'name' => 'keywords',
                'content' =>  'some, keywords'
            )
   );
drupal_add_html_head( $meta_description, 'meta_description' );
drupal_add_html_head( $meta_keywords, 'meta_keywords' );
}

Finally change 'content' with your content.

Thanks
George

Thanks @gtsopour, I tried to get your example to work with the Bartik theme, to only show the description on the front page, but couldn't make it work. It works if I use hook_preprocess_html in stead though:

function bartik_preprocess_html(&$variables) {

  if(drupal_is_front_page()) 
    { 
  //    print "is front page"; 
      $meta_description = array(
              '#type' => 'html_tag',
              '#tag' => 'meta',
              '#attributes' => array(
                  'name' => 'description',
                  'content' =>  'some description here'
              )
      );
      $meta_keywords = array(
              '#type' => 'html_tag',
              '#tag' => 'meta',
              '#attributes' => array(
                  'name' => 'keywords',
                  'content' =>  'some, keywords'
              )
      );
      drupal_add_html_head( $meta_description, 'meta_description' );
      drupal_add_html_head( $meta_keywords, 'meta_keywords' );
    } 
  else 
     { 
  //     print "is not front page"; 
  }
}

You can insert the site slogan like this (in stead of 'some description here'):
'content' => check_plain(variable_get('site_slogan', ''))

Concerning to the first answer:
'some description here' - it is a static parameter,
how can i input a variable from "Metatag" module, non-static?
Or from something else module