A calculation of the monetary value of an investment versus its cost. The mathematical formula is: (profit minus cost) / cost. If you made $10,000 from a $1,000 effort, your return on investment (ROI) would be 0.9, or 90%. ROI is often used to evaluate business strategy, including all advertising and marketing efforts. Return on ad spend (ROAS) is a similar metric, but it focuses more on specific tactics, such as an individual ad campaign.

Effective Email Marketing
Email marketing is quickly becoming one of the most popular forms of Internet advertising. This is because there are many distinct advantages to the concept