redirection

Google wants the page you show to Google to be the page that users ultimately see. If your page redirects people to another page, that's a “Doorway Page”. Needless to say, Google doesn't like sites that use Doorway Pages.Sneaky redirects is a big no-no. If caught for that, a site is not just penalized, but possibly de-indexed.

'301 redirects' dilute some PageRank, according to a Webmaster Help Video.However, Matt Cutts says that they are similar to direct links.