Microsoft adCenter (formerly known as MSN adCenter) provides pay-per-click (PPC) advertisements in search results on BING. Similar to Google AdWords, Microsoft adCenter uses both the maximum amount an advertiser is willing to pay-per-click on their ad, and the advertisement’s click-through rate (CTR) to determine how frequently an advertisement is shown. This system encourages advertisers to writer effective ad-copy and to advertise only on searches which are relevant to their particular advertisement.
Microsoft adCenter has over 17 million monthly users because of its flexibility; it allows advertisers to target their ads by restricting them to a given set of demographics and by increasing their bids whenever the ad is seen by a user of a certain demographic – adCenter also allows advertisers to run their ads on specific days of the week or certain times of the day.
