Projects, or series, are concepts that a photographer repeatedly shoots over time, with slight variations. The resulting images tend to show more about how a photographer shifts his or her, vision over time, as well as improve their skill set.
One of the enduring “projects” of mine is “environmental portraiture”. At some point, that came to include tattoos. Not the ‘cute’, or ‘matching my mom’s,’ type of jewelry, but something that has deep, maybe spiritual, meaning to the person.