What are ‘reads’ in mean reads per cell? What are 'reads' in mean reads per cell?
If this question is about 10x `cellranger` data then details can be found [at this link][1].

    Mean Reads per Cell	= The total number of sequenced reads divided by the estimated number of cells.


  [1]: https://support.10xgenomics.com/single-cell-gene-expression/software/pipelines/latest/output/metrics