Selected answers from the Dumb SEO Questions Facebook & G+ community.
Kenneth Villegas: Hi guys! What if I will not 301 redirect my old domain to my new domain? Does it affect as duplicate website?
Collin Davis: If the content on both of them are same, then yes, it would create a duplicate content issue.
Martino Mosna: The problem here is not about duplicate content. The problem is that the new domain cannot inherit the domain authority and trust of the old one.
A very serious issue.
Reginald Chan: +Kenneth Villegas I got to agree with what both the above said. See it this way.
1. If the content are same, duplicate issue yes. 2. If your blog is rather old and have good ranking, better 301 redirect or else, it will feel like doing everything back from scratch.
Hope this helps.
James Payne: Best not to have duplicate content. Why would you want to do this? If you are going to move the 301 redirects are the way to and use the Change of Address tool in Webmaster Tools to notify Google of your site's move.
Search Lab Marketing: Kenneth, If the old domain remains live with that content and that content is now duplicated on your new domain you could be at risk for a duplicate content penalty from Google, but there are other reasons beyond duplicate content concerns why you should 301 the old domain to the new one.
1. It helps you preserve your audience. ;People that might have bookmarked your original domain will not be automatically directed to your new domain without a redirect of some kind being present.
2. It prevents the old domain from cannibalizing the keyword ranking potential for the new domain (assuming this is within the same industry and search-related keyword terms).
3. If you’ve verified yourself as a contributor to the original domain through your Google+ account you might someday be missing out on Author Rank potential (though this isn’t in place yet).
Kenneth Villegas: Thanks for all your comments and suggestions guys! but i need to clarify this. The old site is not really the same to the new domain and even the content but there are some pages that have duplicate to the old site. Here's the old site ;wwwdotyourpropertyclubdotcom and the new site ;wwwdotypc-groupdotcom so you can compare it.. +Search Lab Marketing ; +James Payne ;the old site is is 9 years old and the new site is 3-4 yrs old..
Search Lab Marketing: After looking at both sites I can see your predicament with this. ;Without reading every piece of content on both, it seems like YPC Club focuses mostly on the 0-10 segment, while YPC Group is a more general realty portfolio management service. ;If I'm reading that right you have a few options:
1. Divorce the 0-10 content from the new website and host it only on the old website. ;Clarify the branding on the old website to indicate that it's a branch of YPC Group and manage both sites as independent entities.
2. Create a content silo on the new YPC Group site that houses all of the YPC Club 0-10 materials and do the 301.
I would personally prefer seeing option 2 because of the branding issues. ;Having (visually) the same company with 2 distinct websites that feel the same to the average user, have the same business address, and do essentially the same thing could feel a little confusing and possibly create a sense of distrust or product value dilution (why do I get the less fancy site).
If you do decide to keep both, you should just remove the 0-10 content from the new site and instead use links on the main site over to the other domain. ;Again, that might feel a little jarring to users, but it's better than taking a hit on your content.
Kenneth Villegas: +Search Lab Marketing ;thanks for your advice! very helpful.. Actually, I'm planning to post a link in the old domain that points to the new site, stating that we have moved to a new website.. I think it doesn't need to 301 redirect the whole site since I found some unnatural links as well.
Hi guys! What if I will not 301 redirect my old domain to my new domain? Does it affect as duplicate website? 
