The document discusses filters in Photoshop. It describes different types of filters like blur, distort, noise, pixelate, mosaic, render, lens flare, sharpen, stylize, emboss, liquify, oil paint and filter gallery. These filters can be applied to images to create various artistic effects by modifying qualities like focus, colors, textures and edges. The document also lists the objectives of explaining the different kinds of filters and their effects in Photoshop.