Yes, it is. With OpenCart, it’s super easy to make your website mobile-friendly, and SE-optimized. By default, your website will be responsive. This means that its outlook will be perfect, regardless of the device it’s being viewed on. And no, you don’t have to tweak any settings for this to happen!
A lot of SEO features like meta titles, meta descriptions, and keywords come built-in with your OpenCart installation. There is also a huge collection of SEO extensions that you can install, to further increase your SEO rankings."