Altmetrics (alternative metrics; article-level metrics) are measures of attention or influence. Altmetrics were generated as a way to quantify the rapid spread of scholarly ideas through social media, article downloads, and other web based activities. Some altmetric indicators also factor in some citation-based data as part of their formula.
Altmetric.com provides a colorful "donut" graphic and the Altmetric Attention Score to indicate activity on the web related to a scholarly output. Download the Altmetric Explorer bookmarklet to your browser (Chrome, Firefox, or Safari). Then, whenever you pull up a journal article with a DOI and click on the bookmarklet, you will get information on citations, Facebook posts, news coverage, blogs, and more to track use and discussion of the article.