Paid SEM is often preferred as a tool for immediate visibility in a search engine. New websites and businesses often invest in PPC or a type of paid SEM. PPC stands for Pay-per-click. It means that you have to pay the search engine who will post your ad in the SERP for every click a visitor makes and enters your website. It might seem simple but there is tough competition in the field of digital marketing which is a global and dynamic marketplace.