What’s in a link? Simple answer: ‘link juice’. Of course if you’re not familiar with the term that won’t really mean much, but the basic idea is that some of the strength of the page containing the link (or ‘juice’) is passed through the link to the linked site. But how much juice is passed? How valuable is a link from site A compared to site B? And how are changes to SEOmoz authority figures going to affect you?