A hugely popular problem (enough of one that we will write a full article about it in the Adult SEO Guide at some point), is getting your keyword density and frequency into your 18+ warning pages.
Keep in mind that SEO principles stand true even on these basic warning pages and that you still have the opportunity to display optimal keyword density and frequency to google and the other engines. For a discussion of different SEO ranking factors and to help you determine what does and doesn’t matter, see this guide: http://www.seomoz.org/article/search-ranking-factors. It basically goes through all of the different metrics that google and other engines use to rank web pages and categorizes these different parts of the page into a tier of importance. Again and again you will see the title tag showing as the most important SEO element, though we still come across sites (and work with companies) who have nonsensical title tags that have no significance to the keywords the site is trying to rank for. Accordingly, you can easily overdo this and have a title tag that just looks spammy and overdone to google with too many keywords. A good guideline is less is more. The more keywords you put into your tags, the more it dilutes the rank of the other tags on your page.
So how do you optimize your landing page to rank for your target terms? Well, call us on 1-866-253-9699.; Just kidding, though that wouldn’t hurt and would save you alot of trouble and time. For those of you that want to do it yourself, you can still use target keywords and tags that google recognizes on these warning pages. The same principles apply. You can display the legal text in an iframe to keep it offsite, or you can display it as an image. The words around this policy can be keyword rich, and you can certainly link build to this page the same way that you would with any other page on your site. One technique used by us and alot of adult SEO professionals is to create lots of additional content in front of this warning page. Not content that can get you in trouble, just enough text that google sees your content and can rank it appropriately. You don’t see thumbnail galleries for example getting penalized for allowing hotlinks without a warning page, even from top tier sites.
Hope those tips help and feel free to contact us for a free review of your particular landing page situation if it is a tricky one.