Visual elements are becoming more and more important for search. These days, it even extends beyond image snippets on the SERP. As one recent example, Bing is delving deeper into what it calls “visual search.”
In the post-Panda world, Google is the search engine most commonly associated with automated evaluation of quality. Bing has made it clear that they’re also in for that game, though, and have provided a list of items to avoid if you want to be seen as a quality site.