There are many schools of thought on how to effectively build the level of trust, also known as page rank, that each search engine attributes to your site.
The more a search engine trusts that your site contains unique and relevant content, the more it will display pages in your site to people searching for related topics.
Meaning that there are millions of dollars to be made, across the internet, for sites that are able to effectively manage their SEO, content and back link campaigns to push their site 'above the fold', or rather, in the top 10 organic search results for their targeted keyword of choice.
To answer your question, no, paid AdWords don't count in this case, because the cost of this paid traffic often outstrips the return for one new customer.
One method involves multiple sites and blogs spread across several unique IP addresses.
As you read this, keep in mind that to successfully execute this method, legitimately, it will require a team of dedicated back link builders or some outsourced work.
Alternatively, you can elect to use one of the premium back link building tools available on the internet, you should be fully aware that this alternative method is equivalent to spamming and is frowned upon.
So much, in fact, that should your back link campaigns appear to be coming from bots to search engine crawlers, your site could begin losing credibility, and ultimately page ranking, on the major search engine results pages.
Having said that, the benefit of this multiple IP approach lies in the fact that, as far as the search engines are concerned, each site is unique and independent of each other.
You can build links back to each of your sites, in what would resemble a spoke bicycle wheel.
Each site benefits from the page rank of another site linking to it, and all of them serve to boost the credibility, visibility and ultimately the profitability of your money/call to action site.
The downside is that you must manage each of these sites individually and write or develop new content to update each site with periodically.
You must do this in order to maintain the credibility and visibility of your outlying sites, so they do not appear to be dead or static pages to the search engine crawlers.
A steady, but consistent effort should earn you a decent amount of ad or call to action revenue.
Just remember that the internet is a enormous entity with countless pages and competitors out there.
The barrier to entry into any internet based business is incredibly low and you will be hard pressed to generate a million dollar site in a day, let alone a few months.
Those of you entering the SEO race today, must remember that this is not a sprint, it is a marathon and while the big players in the field already have a huge lead on you, there are plenty of businesses out there that are in dire need of advice and help competing on the world wide web.
If you take nothing else from this article, please remember to take a measured approach to your back link campaign.
I say this because, as with all things in life, an effective and profitable SEO back link campaign requires zen, or rather, balance.
Essentially, you cannot become so focused on building the links that you neglect to develop any new and unique content, at the same time, you cannot just ignore the entire back link building process and generate content.
While the latter may work out for you eventually, chances are no one will ever be able to find our amazingly well written articles without that tedious, yet essential, back link building campaign.