I'm also a professional SEO, there are opportunities to market your art everywhere, I use Pinterest, Twitter and so on, the best live results I get are from Pinterest and Twitter personally. The Google Bot thing you all see is great if you Google your own name specifically but otherwise it's just a 'crawler' post a few of your pics to Twitter, when Artists and Art Sites follow you, follow them back, add a little courtesy and a "Thank you' works wonders just don't the "R U there", "How R U" stuff.... interact with follows that follow you after you post some art, it's a two-way street but for me Twitter, Pinterest and a few submission runs (use a free Submission service) covers the other holes. Google and Bing submissions because of algorithms is not really prominent now, but word of mouth, interaction with other like-minded people and organizations is the best approach.
You can even set up an artist site on say, Facebook and add a 'Shop now' button via FAA and expand your audience that way too..
R.