Going through some of my analytics I notice that a few of my images are ranking pretty well for keywords that I'd like to target, but my actual pages aren't. I'm getting good amounts of impressions, but zero clicks. A couple of questions: 1. Can I replace those images (making sure I keep the same file name/location) without being penalized by Google? Will it affect rankings positively or negatively? 2. Do you guys have any strategies of making those images more appealing to get clickthru's to my pages? I was thinking of adding text to the images with teaser lines that might interest prospects enough to clickthru to the site. Thanks in advance!