PPC is a form of Search Engine Advertising and stands for Pay-per-click. It is a model which is being used by the digital marketing community wherein the advertiser will pay a certain predefined amount for a single click on their ad. These ads can be either text ads or image ads or video ads.
Whereas, AdWords is a service provided by Google which helps businesses and organizations to create and display their ads in various search engine (Google being the prominent one) and partner sites associated Google. In this service the advertiser can create ads based on keywords which the advertiser believes are being typed by their prospective customers, when they doing an online search. Advertisers can create a single ad or multiple ads