Ad - Keyword relationship

[meet]

Hi,

I am beginner in using adwords API. Please help me in clearing
following doubts :


How keyword and ad are related even though in API they are mapped to
AdGroup ? What I want to know is how your keyword search on google
will lead to a particular ad present in an AdGroup ?

Please suggest.

Regards,
Meet

[jstedman]

An AdGroup has Ads and Keywords associated with it. When you search on
Google for a particular Keyword, all AdGroups that are bidding on that
keyword enter an auction for who gets to display their Ads first. The
winning AdGroup will show an Ad on the search engine results
page(SERP) in top position, followed by the second place AdGroup. The
keywords(or other criteria like Audiences) help to determine when a
particular AdGroup enters an auction and how much will be bid by that
AdGroup. An Ad is just an Ad and is displayed if the AdGroup it
belongs to places high enough in the auction.