TweetMatt Cutts: Great question. Whenever rel canonical was first introduced we wanted to be a little careful. We didn’t want to open it up for potential abuse so you could only use rel canonical within one domain. The only exception to that was you could do between IP addresses and domains. But over time we [...]

TweetMatt Cutts: I’m going to take your question and answer the question that I want to answer, which is some people seem to think, “Oh how much PageRank do I lose or how much link juice do I lose if I do a 301 redirect.” You lose just a tiny little bit, not very much [...]