Scopus CiteScore
"CiteScore metrics from Scopus are:
Comprehensive
Transparent
Current and free
Use this page to find a source and view associated metrics. Use qualitative as well as quantitative metrics when presenting your research impact. Always use more than one quantitative metric."
For more information about CiteScore, go to https://service.elsevier.com/app/answers/detail/a_id/14880/supporthub/scopus/