When you purchase visitors or "clicks" from a search engine, this is called "pay-per-click" (PPC) search engine advertising. "Organic" or "Natural" search engine optimization (SEO) is accomplished by optimizing your web pages and by increasing your "link popularity".
Today, there is a big myth that natural search engine optimization is inexpensive and easy. For example, if you wanted your web site to rank high for the keyword phrase "life insurance" or "debt consolidation" you're going to need to budget a minimum of $50,000-100,000 a year!
1. More searchers click the natural search engine results versus the pay per click ads, so you'll get much more traffic for less.
2. One of the biggest factors to improving your rankings with natural search engine optimization is by boosting your "Link Popularity".
With that said, the biggest weakness of natural search engine optimization is the time required to generate links and "tweak" your web pages and keywords to get those prized high rankings you so desire. It can literally take 3 months or more to finally enjoy the benefits of your search engine optimization campaign.
The biggest benefit of pay per click is the fact that it will provide you with an immediate boost of qualified visitors, lead and sales giving you fast results within just hours or days. In fact, a pay per click advertising program is your best option if you seek fast results and a good return on investment while you are waiting for your Search Engine Optimization (SEO) program to "ramp up."
The golden rule in marketing is that you should constantly strive for maximum results and ROI for your budget. In other words, if your marketing is making you a profit - even if it's a thin profit - it's worth it. By this model, pay per click is worth doing, but overall pay per click will leave you with thinner margins.
The reason for conducting a natural search engine optimization campaign is to significantly increase your margins over the long term.