Over the last decade, scholars have begun a great migration into online spaces, moving workflows, and discussions to online platforms like Mendeley, blogs, Twitter, Facebook, and more. In these new spaces, once-invisible interactions like reading, saving, discussing, and recommending become visible. They leave traces. Observing these traces can inform new metrics of scholarly influence and impact—so-called altmetrics.
Article level metrics
Journal Level Metrics
How alternative metrics should be used (from http://impactstory.org/faq):
How alternative metrics should not be used (from http://impactstory.org/faq):