Below gallery shows the images from the Products you put for sale. These can be useful in showcasing the products image together.
Below gallery is made if from isolated images. You can upload them one by one and apply some beautiful styles. Can be useful in any other special products or services you have.
Below gallery is made if from images from Media Library. You can bulk select the images, so no need to upload one by one. Masonry can also be applied which arranges different size images very well. (Or you can disable Masonry and force images to be in same size for perfect grid display.)