1. Sign in to your Joomla! site administration ([sitename]/administrator). Click on the 'Site' menu link.
2. Click on 'Global Configuration.'
3. Move to the 'Site Settings' column. Change the value in the 'Site Name' field. This is the field used for the heading.
4. Move down to 'Site Meta Description.' Type your custom description here. This is displayed beneath the site header in Google search results.
5. Click on 'Save Close' to save your changes.