"Altmetrics is the study and use of scholarly impact measures based on activity in online tools and environments."
Priem J, Groth P, Taraborelli D. The altmetrics collection. PLoS One. 2012;7(11):e48753. doi: 10.1371/journal.pone.0048753. Epub 2012 Nov 1. PMID: 23133655; PMCID: PMC3486795.
AKA social influmetrics (Rousseau and Ye 2013); social media metrics (Haustein, Costas, and Lariviere 2015)