All of the examples on this page are NOT paranormal as are 99% of any other photo you will see similar to these.
These are explainable by simply saying they are reflections of dust, pollen, fabric dust, etc, caused by the flash of the camera. Some of these may look see-throughish and you might see faces in them. They will come in different sizes and color. Most will be perfectly round. You might only see one "orb" or you might see many.