While there are plenty of nicely designed templates available to choose from, something even more important often goes overlooked when choosing a WordPress theme: search engine optimization. The Internet is an ever-growing ocean of information and it is imperative that your site not only stand out visually to your visitors, but structurally to search engines. X has been built from the ground up using the latest, semantic HTML5 markup, allowing search engines to easily distinguish where your main content starts and ends and easily distinguish what it is about. Semantic markup also means clean markup. X has been architected to avoid extra structural code and presentational items in your main content, which can cause problems as your site is being indexed.