Amir runs Apricot, an agency that creates video campaigns stimulating client growth. Prior to launching the business, he worked in film distribution, devising marketing strategies for both cinematic and straight to DVD releases. Away from Apricot, he’s coached on Seth Godin’s altMBA program, reads avidly, and studies persuasion and the related fields in depth. Follow Amir on Twitter at @apricot_amir.
Another reason is that if you're using an image as a link, the alt text for that image will be treated similarly to the anchor text of a text link. However, we don't recommend using too many images for links in your site's navigation when text links could serve the same purpose. Lastly, optimizing your image filenames and alt text makes it easier for image search projects like Google Image Search to better understand your images.