Wealth is in most respects more tangible and therefore easier to understand than money. Useful goods and services and, perhaps more crucially, the productive resources needed to create useful goods and services, are wealth. A loaf of bread is wealth, as are the farms, factories, and human labor and ingenuity that are needed to grow and process the crops necessary to produce it.
Money, meanwhile, is best understood as a tool used to transform wealth from one form into another. For instance, your skills and ability to perform work are a form of wealth. So is the food you eat. The money paid to you in wages which you in turn pass along to the grocery store performs the simple yet crucial task of efficiently transforming your labor into food.