Wouldn't it be unfair to conceal our small masterpiece from the rest of mankind? Let's save it for the Web too!
§ 1. Pull down "File > Save for Web". A huge dialog window appears. This dialog lets us optimize image quality / file size ratio visually. It is important to save images at the smallest file size we can, without sacrificing too much of the image quality to minimize the download times of the web page they appear on. This is known as image optimizing.
§ 2. First of all, let's select an output format. There are 4 options there; the most popular of them are JPEG and GIF formats. GIF format is better for graphics such as text, logos and cartoon type images, while JPEG images (with a .JPG file extension) are best suited for photo quality images. So, let it be JPEG at this time.
§ 3. Estimate the optimized image preview and the target file size value. Adjust file size to image quality ratio by moving the "Quality" slider.
§ 4. If your image is too large for a Web publication reduce target dimensions as it is shown in the movie.
§ 5. Click "OK", select a target folder and file name, and save the image.
NB The settings you choose in "Save for Web" dialog are applied to the Web optimized copy, and not to the source image file.