Some publishers provide article level metrics on their websites. The metrics that are provided vary among publishers, but they usually include one or more of the following: usage (article views, article downloads); citations (number of citations in Web of Science, Scopus); saves to citation managers like Mendeley; and discussions (mentions on Twitter or Facebook). Examples of publishers include the following:
Article Level Metrics (ALMs) "provide a picture of how an individual article is being discussed, shared, and used" .
Altmetrics vs. Article-Level Metrics
"As adoption of Article-Level Metrics has increased, the term “Altmetrics” is sometimes used interchangeably with ALMs. It’s important to distinguish between two similar - but not synonymous - terms. ALMs are an attempt to measure impact at the article level. In doing so, ALMs draw from a variety of different data sources, some traditional (e.g., times cited) and some new (e.g., tweets). The attempt to incorporate new data sources to measure the impact of something, whether that something is an article or a journal or an individual scholar, is what defines altmetrics. Altmetrics are about the data sources, not the level of aggregation. ALMs are about the incorporation of altmetrics and traditional data points to define impact at the article level."
SPARC - Scholarly Publishing and Academic Resources Coalition - See more at: https://sparcopen.org/our-work/article-level-metrics/
Source: Yale Medical Library, https://library.medicine.yale.edu/tutorials/1271