There are actually several dimensions to image optimization that involves better placement in search results, optimization for user experience and in some cases, optimization for easier sharing of images on the social web. Whether you’re good at graphic designing but you’re awful on optimizing your image for your web and search engines, then you’ll end up nothing.
For image SEO, it can be helpful to think of optimizing images like optimizing a tiny webpage within your page. Things like url structure, anchor text and descriptive tagging are factors for optimizing images for search engines, just like regular webpages.
Here are a few tips for optimizing your images to improve their performance on the page and in search.