I've read that a lot of MNA sites have lost their rankings. The MNA strategy focuses on products which are now classified under shopping so google is looking for shopping sites and amazon and shopping sites have taken over in rankings for products. But if I click on fewer shopping sites, I can see some MNA sites show up in the first page. It seems that google is trying to categorize the web and if your site doesn't fall in the category of the search term, it isn't regarded as relevant.
That's whats going on. I am sure you are going to see more and more of this. People who build new MNA sites are not going to go anywhere near the top ever again.
Speaking of MNA.. I posted about what I would do in another thread these days with the new update. How I would build a site. I figure I should share it here since the quality signals has gotten everyone thinking about how they are going to approach things next.
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If you must know, I am working on three e projects right now. Only one of them is based on keyword researching into picking a niche. How did I do it?
Step 1: Searched google for 'top 100 adsense keywords 2010'
Step 2: Took the top 20 and ran a keyword check with MS
Step 3: Looked at who was least competitive on allintitle and had decent traffic
Step 4: Jumped on google and looked at who was playing in that space.
Step 5: Went back to MS (Market Samurai) and dug deeper into the keyword term. Wow there was a lot more to it than I thought, and more pockets out there.
Step 6: Checked out handful of those pockets. There is some pretty solid sites out there, so I know there is money.
Decided to go for it.
For the other two niches, I decided to hit two big traffic markets starting from the top. I will create mega authority sites with all the various elements google wants to see. My content is going to start in the keyword phrases that I know I can compete in first. If you were doing MNA, you would have registered a domain, made articles yada yada. That's not what I am doing. I will put it into my big site, and create the appropriate content for that niche. Of course I will go for the product terms first so I got the money stuff ready.

... Then move on to information based terms. Site will include:
- Shop area with reviews
- Community area with videos, images, blogs, forums, wiki, facebook, myspace
- Update area - gbuzz, twitter
Shop get the affiliate sales while the Community gets the ad space for cpa, adsense, and the like. Will start off with an OpenX server as well so when I reach 5000 visitors a day, I can start selling my own ad space and making the real money then

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Each site name has an identifiable brand. There is the possibility in the future of even creating my own product. Don't know if I want that hassle though. The domain names combine the core term with something else. Using that I can market it in a certain fashion. Best of all, its UNIQUE. This means I can carve out my own space online as a brand.
As I build out, I will continue to just keep on building more and more brands, topics, keywords into it so that eventually I will be going head to head with some of the bigger boys out there.
Will I not rank on some terms? Sure.
Will I end up with a big dudd? Not likely.
What if Google deindexes my site? Not likely, but if so, I'm plugged into social media traffic sources as well.
There you go. This is what I would do. Rather, what I am doing.
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That was directed to people who are into building MNAs.
You know, the recent additional of the Wonder wheel has gotten me wondering if the levels of terms actually does have any effectiveness. I mean, has anybody done a comparison of the Wonder wheel against the top ranked sites to see if they do indeed have a similar keyword set? I like the concept of using it in sites as your levels of content, but it seems to early to tell if it really is effective or not.