At one time, the only realistic way you could reach potential customers was to use expensive advertising or try to get media publishers to pick up on material placed by your public relations（PR）firm. Today, the World Wide Web has completely changed that dynamic. It's now cost effective and practical to speak directly to your cus-tomers and establish personal links with potential new customers for a fraction of the cost of the traditional big budget advertising campaign. And with that, the rules of marketing and PR have changed forever. 感謝您對大師輕鬆讀的愛護，並且全力支持您合理地使用我們為您精心編製的內容。希望未來可以提供您更方便更友善的服務。