A project is a collection of configuration and apps for a particular website, while an app is a web application that does something – e.g., a weblog system, a database of public records or a simple poll app.
For example, if you wanted to create a website for a restaurant, you would create a Django project called “restaurant_website”. Inside the project, you would create several apps, such as a “menu” app, a “reservations” app, and a “contact” app. Each of these apps would be responsible for a particular feature of the website.