Return on Investment or ROI is how much profit or cost-savings is realized from an investment. The calculation for ROI is Gain from Investment minus Cost of Investment divided by Cost of Investment. In business, when a given investment does not have a positive ROI or there are other opportunities providing higher ROIs, the given investment should not be undertaken.
Clients at Slingshot SEO have received a full ROI on their website in under three months. SEO often has a very quick ROI due to its cost effectiveness as a marketing tool. Websites with effective SEO often have a full ROI multiple times due to the fact that once a top natural search engine ranking is achieved, it can be maintained indefinitely with very modest maintenance investments.