Salts of weak acids and bases are the ionic compounds formed by the reaction between a weak base and a weak acid. For example, if acetic acid was to react with ammonium, the salt ammonium acetate...
There are only a few common strong acids (HCl, HBr, HI, HClO3, HClO4, HNO3, H2SO4) and only one strong base (OH-) in water, all others are considered as WEAK.