When assessing page structure and layout, there is a subtle, yet strategic way to use images in an SEO-friendly manner (beyond ALT tags) that improves your search rank while allowing you to integrate the necessary marketing message(s). Confused? Let’s look at an example:
Suppose you operate a travel website and you want to optimize a given page for the term “Sri Lanka hotel”. Suppose that you also want to include an enticing marketing message such as “Book now and save 30%!”. you may want to place the tagline in an image and the key phrase (i.e. Sri Lanka hotel) in a header tag. This places emphasis on the desired term, yet still provides a marketing opportunity without compromising keyword consistency.
However, you have to consider the followings about Image Optimization