Now that it's been confirmed Google will be rolling out a mobile-first index in 2018, SEOs and marketers worldwide are rushing to get prepared.But how exactly are you preparing for this change?With the help of savvy marketing and SEO professionals, a little research, and this article, you'll definitely be better equipped to tackle this rollout with confidence.But before rushing out to make website changes, let's look back to fully understand the importance of this mobile-first index, plus what it means for SEOs and marketers.