If you add keywords/metadata to your images with Bridge CS3 and then upload it to your blog can google index them? Is there anyway of telling if this Social media portrait is holding my keywords? A client asked me if there was anyway I could add copyright to their avatar portrait
I am not sure whether or not Google indexes embedded metadata and if so which types (EXIF, IPTC, XMP ...); what it certainly doesn't index is metadata entered in the operating system's proprietary file info that does not get embedded in the file itself but stored only locally in the OS's file system (such metadata is consequently not uploaded to the web server along with the image file).
You can drag the image from the web page you mention to your desktop and then open it in Photoshop to check the metadata contents.Your image does not contain keywords nor copyright data, but it does have EXIF metadata embedded (the photo was shot with a 24 mm lens on a Nikon D1X in march 2003).
When you save your edited images, either use the "save as" (not the "save for web") feature or upgrade to Photoshop CS4 or CS5 which now has an option to keep some or all metadata even in the "save for web & devices" dialog*. I would also recommend to convert your web images to sRGB and embed this profile.
(on the right side, above the colour table in the full size screenshot)