Ad rank says A’s Ad should be on top followed by others. Sorted! But, there is another part to the story.

Adrank is Google’s algorithm. Higher ad rank better ad position lesser cost per click.

Adrank is a formula by Google to determine your ad position

Ad ranking in Internet showcasing is the situation of a compensation for every snap (PPC) advertisement on a web crawler comes about page (SERP). The situation of this promotion relies upon the situation of every catchphrase incorporated into the advertisement, which is dictated by your offered for that watchword or advertisement amass duplicated by the coordinated catchphrase's Quality Score.