Capacitance is a physical quantity that describes the ability of electrial storage in capacitors. F(Farad) is an unit for expressing capacitance.
A quantity expressed by F is too large for capacitance range where ceramic capacitors are generally used. Instead, μF(micro Farad, one millionth of Farad) and pF(pico Farad, one trillionth of Farad) are often used as capacitance units of ceramic capacitors. We can roughly devide ceramic capacitors more than 1μF to high capacitance, and ones less than 1000pF to low capacitance category. However, the criteria of devision depend on situations.