The advantage of this pay per click system is just how directed the advertising is and of course, more effective use of a marketing budget. Your ad will only show up on sites where people are already interested in something related to what you are offering. The largest and best known of these pay per click services is Google with their Adwords program. The process is easy to understand; all you need to do is provide Google with the phrase or word that you want people to use to see your advert. Depending on how much you have paid your advert will either be at the top of the search result page or in the right hand column.