“2-yr mean citedness” is the OpenAlex field summary_stats.2yr_mean_citedness (CC0): mean citations per paper over a two-year window. It is a raw bibliometric field, not a journal rating, and is not used for default ranking.
Mathematics239Social Sciences158Arts and Humanities22Business, Management and Accounting22Economics, Econometrics and Finance22Education: Special aspects of education1Science: Mathematics1