Hi Tommy,
Google Adwords, (PPC) Campaign does not influence the Keywords Ranking of anyone's Website. SEO is the process through which Keywords Ranking can be improved.
Google Adwords are paid ads campaign on Google when the balance for Campaign ends, the ads are nowhere in Google.
Not only, Google but also Yahoo, Bing, Facebook has started with Pay-Per-Click (PPC) Campaign for your business website to be listed.
Hope, this information helps you