DD cream, which stands for "Dynamic Do-All" or "Daily Defense," is a type of makeup product that combines the benefits of BB cream (such as moisturizing and brightening) with the benefits of CC cream (such as color correction).
While DD cream can provide some coverage and help even out skin tone, it's generally not considered a replacement for foundation. DD cream is designed to provide a more natural, lightweight finish, while foundation is typically used to create a more polished, full-coverage look.
That being said, whether or not you can use DD cream as a foundation depends on your personal preference and the specific DD cream formula you're using. Some DD creams may provide enough coverage to be used in place of foundation, while others may not. If you're unsure, it's best to try out the product and see how it works for you.