How do default values assist with data entry?

What will be an ideal response?

A default value is a value automatically entered into a field when a new record is created. For example, perhaps the majority of your customers live in a specific city. In a Customers table, you can set the default value for the City field to Pittsburgh. When users add a record to the table, they can either accept this value by just tabbing to the next field or by entering the name of a different city.