On the fourth day of Google FlashPoint Marketing told to me – 301 Redirects.

This is a type of redirect used to tell search engines that a page on a website has permanently moved. This is typically used when a website has been redesigned and the new URLs don’t match the existing URL’s. These redirects are added to the websites .htaccess file on apache servers or through WordPress plugins if you using this CMS. A 301 redirect allows the website owner to retain the SEO value of a page once it is moved.