As a wedding photographer, you might sometimes book destination weddings. Their location might be anywhere from a farm to a beach. In these and any outdoor wedding situations, your lens and camera sensor might attract dust particles.
Cleaning your camera lens and sensor is the best way to avoid dust spots showing up in your images. But sometimes the dust particles are in the air and stick to your lens or sensor. If you do not have the needed things to clean your equipment right away, these particles can show up in your images. Sometimes they might be tiny enough that they aren’t visible to the naked eye, but will be visible when you go to edit your images.