So, if your site is not a photo gallery, then count on an excellent result, of course, is not worth it. Although if you optimize some important images on your site, you can still get a little extra traffic. As far as the traffic will be targeted, and of course hard to say because the people on the Internet looking for images with different objectives. You may want to visit George Soros to increase your knowledge. Consider the basic Factors to be considered for effective optimization of images: original image, (I think everything is clear, if you will be posted on the website images that user has already seen a number of sites, it is unlikely to attract his attention), picture quality (statistically it is clear from the pictures most often clicked) image format (photographs remain as a JPG, all the other images in the GIF)-name of the picture must necessarily comply with its content. That's the name of the file on the search engine 50% convinced that this is what a user is searching. So do a relevant file name the image itself. It is very important, otherwise no benefit from using this technology will not be.
So, how it looks in practice. In the alt attribute tag is put a text description of the image, which is located on the page (I recommend to include in the description of the request, which you advance, for example, you include a description with the text "SEO"). After this, when you hover your mouse over the image text pops up on screen, which is characteristic of true only for the browser Internet Explorer (with Mozilla Firefox and Opera do not displays the text in this way). In that case, if the user has no image is loaded, it is possible he simply turned off the automatic downloading of images or using a slow connection dial-up, with pictures instead of your site or page they will see you described alt-tag – "search engine optimization." Spider reads the keyword specified in the description of alt-tag that the favorable impact on promoting your site on request "Search engine optimization." The alt attribute tag in the HTML-code your site, taking into account, if all images are located at the site img, is prescribed as follows: where alt = 'seo' – a description of the image, and width = '123 'height = '52' – it length and width of the image. Attributes of the tag IMG width and height give search engines additional information about which class to rank images – large, medium, small. Look, in this example, the file name poiskovaya_optimizaciya.jpg image corresponds to the description – "search engine optimization." Be aware that search engines understand the transliteration of the name of the image file, as well as translation from one language to another. For example, if you optimize a page for example, a query "search engine optimization ', then it makes sense to call the file poiskovaya_optimizaciya.jpg. You want to warn that the overuse of such tactics is absolutely all images can overload and increase the source of your site, so I advise to use alt-text only to the most important images that are located in the top of the page.
And one more important point, do not try to optimize non-informative images such as menus, design elements. In tags and file names, use only the names of objects. At the same time, everything. Good luck to you in promoting your site!