With this plugin you can control which pages Google shows in its search results and which pages it doesn’t show. By default, it will tell search engines to index all of your pages, and to only show the first pages in the search results. Category and tag archives are also excluded from search engines index.
Install the plugin and activate it. Go to the settings and set the default image, description and your Facebook page your site is associated to. These settings are optional, if nothing has been set, it will use the system’s default settings.
If you want a page or a post to have “noindex,follow” tag and tell search engines to not index that page/post, just enter anywhere in the post this tag:
You can download the plugin from here.