The Drupal platform is designed to be conducive to solid Search Engine Optimization (SEO) “out-of-the-box” and the architecture encourages site builders to implement good SEO practices in their workflows. SEO-friendly naming conventions, correct tagging of content, and focus on accessibility are all built into Drupal core with the goal of helping search engines find and catalog your site. So, with targeted content, a properly coded theme, and installation of SEO boosting modules your site has the potential to rank very well.
Where to start? Fundamental SEO strategy