Cannot figure why SEO would differentiate between image file format. In any case, images should all have alt="alternate text" attribute, which is what would influence page "content" rating.
Have not gotten into SVG or APNG. Basic Web image formats are JPEG, GIF, PNG.
A GIF image is a GIF image whether animated or not. SEO crawlers don't "see" the difference; they just read the ALT text. (I think.)
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JPEG's are for tonal images (photos, gradients), GIFs for flat 256 colors and transparent ares. PNG-24 offers shades of transparency.
Last edited by auntnini; 01-13-2013 at 04:17 PM.
Reason: amplify JPEG v. GIF
It seems that the multiple frames of an animated GIF are no draw to search engine crawlers wheras image quality is now, and the reduced palate of a GIF is a drawback, so I've gone back to a J.PEG for my home page..
Auntnini... I decided to settle for this on my Servers forum where I raised the same question... http://forums.powweb.com/showthread.php?t=94004
Thanks for the links, they are rather good.
Jpegs and gifs are the most commonly used graphic formats on the web. Each has it's unique advantages and disadvantages. The material covered in this article will help you decide which format is more appropriate for your images. A general rule of thumb; use gifs for illustrations, clip art, and images with large areas of flat color, use jpgs for photographs and images with continuos tones.
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