Altmetric track who is talking about research papers and what they are saying.
It constantly monitors social media sites, blog posts, news stories, wikipedia, mendeley, facebook, government policy documents, patents and other sources for mentions of outputs. See the lists of sources and news outlets tracked by Altmetric.
Altmetric scores for articles and outputs are displayed in a lovely colourful donut. You may see these donuts displayed, for example, in Discovery or at a publisher web site.