That actually depends on the size of the site.
If you're working on a large site and you simply stick in a 301 there's a very good chance you will see substantial content disappear from Google.
301 is perfect for page-to-page, and multiple-pages-to-new-root, but there are quite a few issues that come into play when it comes to redirecting deep content on a page-by-page basis.
Larger sites need managed redirection - do it in one go and prepare for quite serious issues.
Rgds
Richard |