Having optimised several large photography sites I have compiled a check list for SEO Image optimisation, following the advice outlined below has positively increased rankings on a number of image rich sites I have optimised this year.
#1 Use Descriptive Image Names
I always use the primary target keyword for the page for example if I was targeting SEO UK as my keyword I would use the image name “seo-uk.png” or “seo-uk.jpg” as this identifies the image a lot better than a generic name such as “image-03.jpg”.
#2 Use a Descriptive ALT
Traditionally ALT text is displayed in text based internet browsers when images cannot be displayed however, Google use the ALT tribute when crawling your website to help identify what the images represent. I highly recommend setting ALT text for all images on your website, if you take nothing else from this guide hooking your images up with ALT text and descriptive file names will improve your sites image SEO considerably.
#3 Use Keyword Text near the Image
Use keyword text near the image or even use CSS to overlay the text over the image(s).
#4 Enable Image Search
Log into Google Webmaster Tools and enable Google Image Search this will allow your website images to appear in Google Image Search. Being listed in Google Image Search should increase traffic and will also target users looking for images, so they could check out other images on your website.
#5 Smaller Image Size
Keep your image sizes down as low as possible, both people and Google hate slow loading times! Your images should be compressed as much as possible without affecting user experience.
#6 Give people Embed Code
Provide a nice easy way for readers to embed your images on their site with copy’n'paste embed code modify the embed code to use your keywords in the ALT text and to link back to your page. Feel free to leave a comment below if you found this guide useful or if you have any further questions.