SEO and ROI
Properly applied SEO techniques can produce a spectacular Return on Investment (ROI). Many companies with a website will engage in Google AdWords campaigns, which is a system that allows you to advertise on Google, but you get charged every single time somebody clicks on your advert.
For some companies this may be an efficient form of advertising; however, it can work out to be very expensive on a monthly basis.
The great thing about SEO is that if you get it right you are not charged every time someone clicks to view your website, and the investment required in terms of both time and money can be far lower than alternative forms of advertising, such as newspaper, radio or television advertising.