ESR and bulk-decoupling fit
For a 500 mA step load, expect about 125 mV of ripple from the ESR alone, before the capacitance term kicks in.
Tolerance and BOM spread
±20 % tolerance means the actual capacitance on your reel can be anywhere from 17.6 µF to 26.4 µF. If the downstream LDO or buck converter needs a minimum capacitance for stability at the worst-case temperature and bias, verify the loop stays stable at the low end of the spread.
