Metrics Toolkit is a resource for researchers and evaluators that provides guidance for demonstrating and evaluating claims of research impact. It provides guidance on available metrics, what they mean, how they are calculated, and whether they are a good match for your impact need.
Utrecht LIbrary provides a useful comparison of Traditional & Alternative Metric Tools The chart below is used with their permission via a Creative Commons License.
From the Independent Review of the Role of Metrics in Research Assessment and Management (UK, 2015):
The Leiden Manifesto for research metrics (2015)
The mismeasure of science: Citation analysis. (2018)
Reviewers are blinkered by bibliometrics. (2017)
San Francisco Declaration on Research Assessment (2013)
Using Metrics Responsibly (the University of Sheffield, UK)