Webmaster Central blog reports, a new update. Now you can submit Sitemaps for multiple hosts in a single host. This is helpful for those who are managing multiple sub-domains under a single domain. As we know Google considers these sub-domains as different websites, previously while submitting Sitemaps you need to create different XML Sitemaps and manage it under different sites. Now you can have a single sitemap.xml combined all your sub-domain URLs and manage, you just need to verify the ownership of all. It can reduce the process time of creating multiple Sitemaps for each of your verified websites.
A Word from the Author:
This will not be handy for entirely different sites, even though you own them. As they’ve mentioned, for sub-domains this can be a useful update if they all are part of a single marketing process.