I have created an image in Photoshop with three layers but after saving as a GIF and if I view it in Browser, the animation is dotted and not clear. If anybody has some idea why please share.
GIFs have a limited 256 colour palette (8 bit). To simulate more colours, Dithering is used. Usually it results in better images.
If there is an option for dithering, turn it off. Otherwise copy your high color image into clipboard, create an 8 bit image and paste it there, then save it as GIF.