Business has several categories of service and different offices for each line of service (three of them). The services are closely related (one serves residential, another serves commercial customers, etc. etc.) We want to make sure that the URL we advertise on business cards, Yelp listing for that office, Google Places for business, etc, brings up the main page for that service. In other words the company name is the same and the services are similar enough to not justify building separate websites for each lines of service. The strategy being considered at this point is to have the domain name used for advertising that service to do a 301 redirect to the subsection home page of that service on the main website. I'm curious what Google will do when it sees this domain in links on Yelp, etc and sees there are no pages for this website and it only redirects to this other domain? I assume Google won't index it, which is fine, but could it somehow have a negative effect on the main website, other than maybe losing 10% of the 'link juice' for backlinks using the alternate domain name? Or should we put a robots.txt on the alternate domain website (that isn't redirected) with a noindex directive to be safe? Or could that trigger some sort of red flag with Google Places for business that we are using a domain that is redirected and not indexed?