Definition - What does Paid Search mean?
Techopedia explains Paid Search
Ideas about the value of paid search have led to major discussions about PPC and other kinds of search engine marketing. Although it’s fair to approach the value of any search engine marketing plan on a case-by-case basis, experts have their own ideas about achievable ROI from PPC and how effective paid search is in general. Those who work in SEO and online advertising will often display the results of past campaigns to promote their arguments, but due to the very dynamic nature of the Web, it’s difficult to generalize about the effectiveness of any one type of online marketing strategy.