We using Smart Filters you need first to create a Smart Object Layer. Actually, any filter applied to a smart object layer becomes a Smart Filter. This type of method is completely nondestructive and offers more image-editing flexibility than ever before.
The difference between a Smart filter and a normal filter is that Smart Filters offer adjustments without compromising any pixel data. We can add multiple filters one on top of one another, change the order of the Smart Filters to change the resulting effect. We can remove or hide Smart Filters at any time or we can continuously edit the settings of the Smart Filters to achieve different interesting effects. Also we can paint in a mask to hide or reveal different areas of the filter for refined edits, all without altering the image data.