This is the development of the client-side part of the website to interact with the users. The designs initially made in the early stages are transformed into special animations and effects. Functions are subsequently integrated based on the choice of technologies and tools. The developers ensure responsive and friendly use of the site irrespective of the device.
The backend is the interaction of the user-side and the server-side, interfacing the whole website. It is more like the engine room. The code at the backend is responsible for the server-side, database, integration of business logic, and so on depending on the purpose of the website.