What Are Altmetrics?
Altmetrics are “alternative metrics” to measure the influence and reach of scholarly output on the Web through peer-review counts, influential news sites and blog posts, citation manager bookmarks such as Mendeley, Wikipedia citations, and social media mentions on sites such as Twitter and Facebook.
Altmetrics go beyond the traditional citation metrics to take into consideration how scholarly output such as journal articles and research datasets are being cited and shared by others on the Web in order to measure influence. They are meant to complement traditional metrics, not replace them.
Altmetrics counts (and scores) are updated much more quickly than traditional citation counts so are especially helpful with “hot topics” getting mainstream attention where citation counts can lag by months and even years.