Announcing Changes to the TrafficEstimatorService

Monday, October 31, 2005

In an effort to provide more consistent and accurate keyword data to our developers and advertisers, we will be changing some of the fields within the KeywordEstimate object on Thursday, November 3rd.

We will add the following field to the KeywordEstimate object:

  • clicksPerDay – (float) The estimated number of clicks generated per day for a keyword in a given ad group

Similarly, we will remove the following fields from the KeywordEstimate object:
  • impressions – The estimated number of impressions for a given keyword
  • ctr – The estimated click-through-rate for a given keyword.
  • notShownPerDay – The estimated number of times that the ad would not be shown, despite a keyword match.

These changes will take effect on the afternoon of Thursday, November 3rd (Pacific time zone). At that time, we will update the TrafficEstimatorService WSDL which may disrupt the operation of your programs. Therefore, we have posted a temporary copy of the “new” TrafficEstimatorService WSDL at so you can begin making the necessary adjustments now (This temporary copy will be removed on November 4, 2005, after the normal WSDL location is updated).

We are in the process of updating the AdWords API Developer Guide and plan to have these new fields added on Thursday.

--Rohit Dhawan, Product Manager