"Altmetrics" is a general term for non-traditional metrics related to scholarly works. See Wikipedia: https://en.wikipedia.org/wiki/Altmetrics
"Altmetric" is a company, a division of Digital Science, that collects altmetrics and makes them available via APIs. See http://altmetric.com
VIVO uses APIs provided by Altmetric to provide altmetrics on scholarly works. Altmetrics makes its service available without fee or license restriction.
Scholarly works identified by DOI, PubMed ID, or ISBN have altmetric "badges" associated with them. These badges are links to altmetrics information provided by Altmetrics.
Clicking on a badge takes you to the Altmetrics web site page for the scholarly work. For example:
Six configuration parameters regulate how VIVO uses and displays altmetrics. See Configuration Reference