What is the significance of taking pictures? What is a photo?

Hello, now photo photography refers to art photography, commonly known as art photo album, or photos. But like the original definition, photos strive to achieve the realm of "truth". Therefore, many commercial photos now, as well as some photos that have to be superficial, empty and meaningless, and have been seriously retouched for the sake of "perfection" in appearance, are also called portraits, but they have long run counter to the original intention of portraits. I hope my answer can help you.