Each keyword gets a Quality Score on a scale from 1 to 10, where 1 is the lowest score and 10 is the highest. Top Adwords agencies provide overall PPC management services including ad quality, auction-time factors, actual search terms, type of device, language preference, location and the time of day.
When your ad agency competes in the auction, AdWords calculates real-time measurements of expected CTR, ad relevance, and landing page experience that, together with your bid and other factors, produce a score called Ad Rank.