I currently have. I have 200 live domain names all travel and hospitality related. Of these sites 3, I wish to promote and increase the search engine ranking. How can i use my existing sites to promote the 3 main sites? Should i use them? They are all hosted on one server. All have different content. I need real tried and tested information that will work and not get me penalized by the search engines. Thanks
You can create backlinks through your 200 sites to 3 main sites and direct traffic of those sites to new sites.
If you are serious about what you are doing and don't mind investing. I would switch them to a C Class IP. At least you can put 5 domains to each C Class IP and so that will make 40 C Class Ips and 200 domains. This will help you much more than linking from same ips to 3 domains.