Sign me up for this book by Brad | Aug 16, 2011 | Updates | 0 comments I know. Trendy. Boring. Nerdy. But it’s such a powerful metric. and this is such a great teaser video. Share this:EmailFacebookTwitterLinkedIn Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.