Maybe you've moved your old store to a new web address. To keep your page rank (yes, we know how important it is) use this module. Simply put, it tells search engines that you have a different URL than the one requested, and the visitor is automatically sent to the new page.
Example: if a visitor types
www.yoursite.com, the SEO Redirect module will automatically tell the search engine that the new site is
www.your-site.com and the user will be displayed the new url. If the new link is valid, the visitor will not see the page error message (404 Not Found) associated to a dead link.
Types of Redirects
HTTP 301 (301 Moved Permanently)
This is a permanent redirect that allows the old page (URL) to pass most of its ranking power to the new page (URL).