It is also known as PPC (Pay per Click) or CPC (Cost per Click). Most of the advertisement campaigns in different search engines are run on PPC or CPC basis.
These ad slots are bought from Search Engines against particular keyword or keywords. Now, when someone searches that particular keyword in search engines, you website links will come under the sponsored listening. So these paid ads are helpful to gain good amount of traffic, especially target audience.
Search Engines will charge you according to number of clicks made on your website link by users.
This type of advertisement can also be run on other websites relevant to your website.
