Saving images onto your galaxy s6 can be a little tricky if you’ve never done it before. Wether you want to save an image from facebook or google your going to take it a step further then just clicking the image and trying to save it. Once you click an image there will either be an option that says see full image, or visit the images page. Then once you take it to this next step all you need to do is hold your finger down on that image and it will begin to save.
To double check the image has saved go into your gallery to make sure the image is there. Unfortunately there is no option to save an image with a name. You have to go back into the gallery section of your galaxy s6 to edit an image you’ve saved to give it a name.