Product photography is a general term simply referring to photographing an object most often for sales or marketing purposes. Taking a photo of an object with the appropriate lighting approach is only half the battle. What separates great product photographers from others is the ability to knock out reflections, get the color just right, work with stylists or alone, get the color correct for print purposes, understand the intended usage of the photos, etc.  Every client has different needs where some product photos get a few minutes of editing others may get a few days of editing.  Every product and subject shoots completely differently and after 15 years we have learned to never stop learning.