Hi, I have some confusion about how our blog subdomain is handled in our sitemap.  We have our main website, example.com, and our blog, blog.example.com. Should we list the blog subdomain URL in our main sitemap?  In other words, is listing a subdomain allowed in the root sitemap? What does the final structure look like in terms of the sitemap and robots file?  Specifically: **example.com/sitemap.xml ** would I include a link to our blog subdomain (blog.example.com)? example.com/robots.xml would I include a link to BOTH our main sitemap and blog sitemap? blog.example.com/sitemap.xml would I include a link to our main website URL (even though it's not a subdomain)? blog.example.com/robots.xml does a subdomain need its own robots file? I'm a technical SEO and understand the mechanics of much of on-page SEO.... but for some reason I never found an answer to this specific question and I am wondering how the pros do it.  I appreciate your help with this.