Altmetrics are increasingly being used and discussed as an expansion of the tools available for measuring the scholarly impact of research in the knowledge environment. NISO, the National Information Standards Organization, defines altmetrics as
"The collection of multiple digital indicators related to scholarly work. These indicators are derived from activity and engagement among diverse stakeholders and scholarly outputs in the research ecosystem, including the public sphere. "For stakeholders interested in the broad influence of scholarly outputs, altmetrics may offer insight by calculating an output's reach, social relevance, and attention from a given community, which may include members of the public sphere."
In general, altmetrics are indicators which seek to capture the attention or engagement achieved by a scholar’s work based on social web data such as:
Scholars have two options for accessing altmetric data about their research.