It's a common idiomatic expression meaning that you should be somewhat skeptical. You can look up such expressions online; here is my favorite site for English idioms: https://idioms.thefreedictionary.com/take+with+a+grain+of+salt

"Take it with a grain of salt" means "Don't take the advice too seriously," or don't completely believe what someone is saying.

It means don’t believe it so easily

Hello Tracy, how are you doing