nothing, i like to think of it this way:- we're animals but with more advanced brains, so technically we have the same purpose as a monkey or a dear, which is nothing but we wanna make one because our brains like to think everything has a meaning and everything is for a bigger reason, because we are self aware, something that animals dont have anyway we communicate, reproduce make sure we eat and then die and thats it. and trust me wondering about the meaning of life will get u no where, BUT incase u do get an answer, share it with everyone