I have registered several keyword rich URL's for clients and am currently setting A records to point these new domains to an existing site. Does anyone know if this is considered spam by search engines? Does anyone know if is beneficial?
I am not sure what kind of redirect you are setting but if it is a 301 then you should be fine. Are you looking for type-in traffic? You will not be able to use the new domains in the search engines if they are just aliases for another site. SE will consider them mirrors and remove them from the index.
But they don't help in the way you are talking about. Unless you are willing to go out and try and develop separate inbound links for each domain, you won't have much luck. And if you do do that, only one of them will end up getting displayed in any given SERP.
I guess I wasn't clear before, I made it sound like I was purchasing multiple keyword rich URL's for one site when in fact I just get one with the most relevant keyword to the company. Then I submit the site to the search engines with the keyword rich URL. The companies main URL would probably still be indexed in time so that's where I'm conflicted. Is this considered mirroring?
So would you say you do recommend using this tactic?
mirror = 2 or more different domains 1 web site. You want to only have 1 domain for each page of content. If you have a domain you want it to redirect fully to the other domain. Meaning that if you type in redirect domain.com in the address bar it becomes domain.com.