What are the entertainment, communication, aesthetic and recording functions of photography?

Entertainment function, your photography as an interest is entertainment.

Communication function, the photos you took were put on social networking sites for circulation and appreciation, which played a role in communication.

Aesthetic function, whether your photos look good or not.

Recording function, your photography at a certain time recorded the scenery at that time, as well as the mood at that time and so on. . .

Personal opinion, unprofessional, for reference only.