Display advertising is a major source of revenue for many of the online publishers and content providers. Historically, display advertising impressions have been sold through pre-negotiated contracts, known as reservation contracts, between publishers and advertisers. In recent years, a growing...

In sponsored search advertising, advertisers bid to be displayed in response to a keyword search. The operational activities associated with participating in an auction — submitting the bid and the ad copy, customizing bids and ad copies based various factors (such as the geographical region...