“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.
Engineering4Social Sciences4Economics, Econometrics and Finance3Energy3Environmental Science3Political science: International relations1Political science: Political science (General)1Social Sciences: Social sciences (General)1