In terms of ranking better.

IMO there comes a time when you have to decide whether you want to have a large, branded site or a bunch of smaller ones.

As far as business models go, both work. It is work to brand a site, and it takes time.

Branded sites tend to withstand the ups and downs in the engines better. A bunch of smaller ones are easier to manage.

I’ll yield to our seo expert to discuss the seo aspects.

Dominique is correct. Both can work.

In terms of SEO the question would be ‘is your primary site have any age or Page Rank?’.

If so you can use that to make a much bigger impact, especially if you are going after a Hollywood term like your example ‘roulette’.

You also have the option of building a subdomain rather than a new site (which would be very difficult to get ranking). Something like roulette.yourwebsite.com. If you link to it from any page (but preferrably your existing homepage because that carries the most influence) the benefits would be passed on immediately.

This is significant because typically link values deteriorate with each link that points off of the page, even if it leads internally. This doesn’t happen with subdomains.

Although Google sees the subdomain as its own individual URL/website, it also recognises that it is a subdomain of the primary URL and treats it like a second level directory off the index page when it passes rank.

On my site casinobonusroom, I am building a section on slots. Should I create a subdomain slots.casinobonusroom.com? if so, should this be taken to the next level and do a poker.casinobonusroom.com, ect? If the section on slots is already on the main site, would a 301 redirect be the way to go to transfer it to the subdomain?
Thanks

Thank you for your comments,

I will keep it for one of my sites. Which brings me to a point you made about domain age.

I have one domain that is 9 years old has PR3 and not really many links pointing back. It is not being updated or anything gets occasional traffic.

What do you think of domain age in terms of SEO ?
I mean how much of a benefit does it have?

One domain would be better in your case since all of the content is around roulette. Presumably, the reason you would want separate sites is to rank for a variety of different keywords (ie: site A is keyword 1, site B is keyword 2, etc). However, you are better off building one site about roulette, building the brand and expanding the keywords for the one domain. This also assumes that you are planning on using ethical “white hat” tactics to gain rankings.

Sub-folders should be used over sub-domains. Google considers a sub-domain a totally different website in most cases and doesn’t transfer the strength of the site to your sub-domain, so essentially it is like starting with a brand new domain altogether.

A 9 year old domain is fabulous, especially if you have it targeted to online casino traffic. You should have a much better luck marketing that old of a domain as opposed to a brand new domain.

Yes, yes and yes.

That is your best bet.

Is there any difference in ranking terms, between a sub domian vs a folder based structure?

Eg.

poker.domian.com

vs

domain.com/poker

Thanks
Mike

Yes a subdomain is a totally diffrent site.

The benefit is that you can utilise geotargeting in Google Webmaster tools.

You would have an easier time ranking for keywords on http://www.domain.com/poker unless http://www.domain.com was about a completely different topic. So perhaps we should say http://www.gamblingdomain.com/poker would be the better choice.