Explain how does Ad rank impact Cost-Per-Click?

[traveloweb]

HI,
Explain how does Ad rank impact Cost-Per-Click?

[Saravanan28]

Ad rank is the position of a pay-per-click ad on a search engine results page.
The position of this ad depends on the position of each keyword included in the ad, which is determined by your bid for that keyword or ad group multiplied by the matched keyword's Quality Score.

[thaichacha]

Quality Score is Google's rating of the quality and relevance of both your keywords and PPC ads. It is used to determine your cost per click (CPC) and multiplied by your maximum bid to determine your ad rank in the ad auction process.The relevance of each keyword to its ad group.

[RH-Calvin]

Ad rank refers to the position that your ad occupies on a given paid search results page. If your ad shows up second, your ad rank for that given search is number two. Ad rank is a value that determines your ad position and if your ad will show up at all for a search.