SEM is not about driving clicks and traffic to your site , It is about driving the right click and traffic to your site.
What is SEM?
Search Engine Marketing is the practice of marketing a business using paid advertisements that appear on search engine results pages (or SERPs).Google AdWords is by many measures the most popular paid search platform used by search marketers, followed by Bing Ads, which also serves a significant portion of ads on Yahoo.
These ads, often known by the term pay-per-click ads, come in a variety of formats. Some are small, text-based ads, whereas others, product listing ads, product-based advertisements that allow consumers to see important information at-a-glance, such as price and reviews.
Why is SEM?
Paid search Advertising