Google’s Matt Cutts: NoFollow Attributes On Internal Links Don’t Hurt But Generally Don’t Do It

In a video, Google’s head of search spam Matt Cutts
published today an answer to the question, “Should I
use rel=”nofollow” on internal links to a login page?”
Matt Cutts basically said you shouldn’t, but said it
won’t hurt you if you did. Matt said, “It doesn’t hurt if
you want to put a nofollow pointing to a login page or
to a page that you think is really useless.” But Matt
said, “in general” it also doesn’t hurt to not add a
nofollow, and in general, you should let Googlebot
crawl and explore your site.
In most cases, using a noindex may be better than
using a nofollow on the link attribute.
This is interesting because of what Matt Cutts
explained in 2009 about using the nofollow of
PageRank sculpting , where it doesn’t work as you’d
expect.
Here is the full video: