When we talk about SEO and search engine ranking, the automatic assumption is that we're talking about Google. While it's certainly true that Google is the most important and influential search engine at the moment, and possibly for the foreseeable future, it's also important to remember that Google has other things besides search in its sights. As Google integrates other features under the umbrella of its brand name, other search engines with more of a single-minded focus may be stepping into the spotlight, and if you're thinking about the future of your SEO strategy, you might want to keep other search engines in mind.