I told you already
Acids are useful in our daily lives
H2SO4 is known as the king of chemicals and is used everywhere in fuels and in chemicals
HCL is used to kill bacteria of the food we eat
Some acids are used in reaction centres in plants for the process of photosynthesis
some acids are used as dyes
coming to bases 
some bases are used to cure acidity in our stomach
some bases are useful in acid-base neutralization reactions which give us salt and water
some bases can derive washing soda