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Excerpt: An interesting interview between Eric Enge and Matt Cutts sheds light on the distinction between the NoIndex, NoFollow and Robots.txt. These are the staples when trying to sculpt PageRank,  so that it accrues only to your most important pages or avoiding excessive duplicate content. The interview transcript reveals lots of useful information but it is helpful to summarise that information which I have done below: Passes PR? Links Crawled? Page Indexed? NoIndex Y Y N NoFollow N N Y Robots.txt Y N URL returned only The noindex and nofollow attributes can be combined. To complicate matters further, the attributes can be used in different ways. Either: a) as part of the link, for example: <a rel=”nofollow, noindex”…