Search engine optimization (SEO) is a key component to customers being able to find merchant's shops through search engines like Google. You can use these best practices to ensure your theme includes any necessary SEO data. ## In this section * Add SEO metadata to your theme — Learn how to add metadata to your theme to allow search engines to find key information about the site. * Customize robots.txt — Learn how to customize robots.txt to control which pages search engine crawlers can access. * Use hreflang tags in your theme — Learn how to use hreflang tags in your theme to allow search engines to surface regionalized and translated content.