put your keywords in your image title, alt, use keywords in your img file name.
A secondary negative effect of images is if the files are too large, the load time of a page will be increased, studies of Panda filter penalized sites found slow load times to be a common factor amount the sites. (Google's internal design goals are load times of 1/2 second for their own pages)
Using a descriptive file name as well as alt text for an image may help overall ranking, and certainly helps the images get into Google image search, which may be of questionable value.
It's spammy to use a file name unrelated to the image, like a pretty girl labeled "high payout casino".
One SEO authority site with advanced tutorial material in their blog: seomoz.com
1. Include Keywords in Your Image File Names
2. Tag Images on Your Website
3. Optimize ALT Tags and Title Tags
4. Add Your Images to Flickr, Picassa and Other Image Sites
5. Add Images to Your Google Places Page
6. Add Images to Your Blog Posts
For more detail visit site given below...
Hi Harris,
Apart from the above mentioned practices.. you can also have the text in the image in selectable form. This will help you have a targeted keyword in your image and which will be easily crawled by search engines.
Make sure you have the rights to images you use or find royalty free images.The more original and relevant your images are the more your visitors will enjoy your content and keep coming back for more!
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SEO? image?