Print Friendly URLs

Pages with a "print friendly" version usually deliver the same content but with a slightly different URL such as &print=yes. The print friendly version should be blocked from being indexed as users should not arrive at a "print friendly" page directly from the SERP. The most important reason is that the page does not provide the same navigational clues and outlets as do normal pages; secondly the print-friendly pages formatting does not lend itself to be the first glimpse users have of your site.