CiteScore by ElsevierCiteScore is a simple way of measuring the citation impact of sources, such as journals. CiteScore metrics (not CiteScore Tracker metrics) are reported once per year, and do not change, so they are suitable for reporting the citation impact of a serial title. Scopus.com is a dynamic database and changes daily.
The CiteScore metrics are created from a snapshot of Scopus, and represent the relative performance of serial titles at that point in time. The metrics for previous years have been calculated by recreating the Scopus database as it was at a consistent degree of completeness (around 95%) for each year's metrics.