
Google launched their PPC platform back in 2000 naming it AdWords. It was not the first system to offer PPC advertising or the first 'bid for position' advertising platform. However, what it did differently was to add a measurement of 'quality' to maximise revenues and improve the relevance of adverts. To begin with this 'Quality score’ consisted of the number of clicks an advert would attract, but over the years Google has refined this to include the following:

Google uses quality score to work out where to place your advert AND to calculate the PPC cost you’ll be charged.
