It is easy to understand or is not difficult to do/understand
My coach always said, “Basketball is not rocket science. It’s about putting the ball in the basket.”
Frequently Asked Questions (FAQs)
The idiom ‘It’s not rocket science’ means “to deal with a difficult situation without being harmed or damaged”
Example usage of idiom ‘It’s not rocket science’: Newspapers have weathered the storm of online information by providing news online themselves.