Here is the list of Google image optimization tips in full:
1. Insert keywords into your Alt Text.
This is the most important part of image optimization and you should include a keyword or phrase that is relevant to the image and your webpage. The alt text should be inserted in the code for your image file.
Here’s an example: <img src="filename.gif" alt="Alt description goes here">
2. Name your Images with Descriptive Titles.
If you have an image of Lindsay Lohan, you could use the term ‘lindsay-lohan.jpg’ to name your image, instead of simply going with the original file name which could be something like ‘b473.jpg’. I usually name my images exactly the same way as my alt text.
3. Use relevant text around your images.
It is recommended that descriptive text with your targeted keywords be placed immediately before or after the image itself. If you do a search for any term on Google Image, you’ll find that a short description of 20+ characters beneath every image. You’ll probably notice that the keyword is listed in bold as well.
4. Use Adsense to assess overall content relevance.
Insert an Adsense unit on the page where your googe images are placed and see what type of Adsense ads show up. This will tell you how Google thinks the overall theme of what your page is about.
Change your content until the Adsense units reflect the keywords you want to target. In my opinion, this is not only applies to Google images but is a generally helpful method as it improves your overall latent semantic indexing score and makes your site appear more relevant to Google for targeted key phrases or words.
5. Optimize Your Title and Meta tags.
This should already be part of your overall optimization strategy and it purportedly helps your site to rank better in image searches as well. Like the use of Adsense for testing, paying attention to this point will help you to have better visibility in Google’s main search engine as well.
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