Most of the commonly used measures of a research paper’s importance rely on counting citations to the paper. Altmetric (derived from Article Level Metrics) is an alternative ranking algorithm that expands on this measure and includes many other indicators. Its use is controversial and some disparage it as the worst sort of popularity contest with no relevance to the real scientific importance of an article. However, I feel that Altmetric is a useful tool for many researchers and should not be ignored.
How Altmetric Measures a Paper’s Worth
Like impact factor, Altmetric uses number of citations in its calculation.