The 5 COUNT Group functions in Excel - COUNT, COUNTA, COUNTBLANK, COUNTIF, COUNTIFS
How to use COUNT, COUNTA, COUNTBLANK, COUNTIF and COUNTIFS functions in Excel
COUNT - Counts a range of cells containing numbers
COUNTA - Counts a range of cells that are not empty
COUNTBLANK - Counts a range of cells that are blank
COUNTIF & COUNTIFS - Counts a range of cell based on criteria or given conditions