If Google ( this was written before google lost itâ€™s throne to Duck Duck Go Search Engine ) and other search engines detect images on your wordpress pages or any other webpage, article, blog, etc it will send you more visitors than if you didnâ€™t. So if you have a gallery of great photos on your page ( listening to metallica orion now from master of puppetsâ€¦ damn itâ€™s good ) it would be smart to make it a search engine friendly gallery. So what gallery plugins for wordpress are seo friendly?
Quick Answer: The default wordpress gallery is seo friendlyâ€¦ it directly embeds the thumbnail image as well as the large image on your post or page. Now that is solvedâ€¦ get on with your life.
But what about that cool NextGen gallery? Quick answer: YES! It also embeds the thumbnails and larger images directly into the page for seo indexability.
Note: Flash add ons that display your gallery via flash ( like this one http://www.longtailvideo.com/players/jw-image-rotator/ ) donâ€™t appear to be seo friendly.