Why do it? You might want to if you have changed domains, merged two Web sites, moved pages, or spelled a domain name incorrectly. Knowing the basics on how to do it is a handy technique, but using
the proper redirect techniques to keep links flowing could prove invaluable.
In step-by-step instructions, Shannon Hutcheson notes that it's important you know to use the 301 redirect
because it acts as a natural bridge between the former and new URL location. The 301 redirection (used to permanently move locations) is SEO-friendly and the search engines treat it with more
authority than a 302 (which is considered temporary only).
Read the whole story at Search Engine People »