Search Ads Changes on Indexes related to Impression Share

-October 22, 2020: Updated the schedule.
(Before) To be determined
(After) Sequentially releasing from October 21, 2020.
    *We will announce once the release completed
-October 15, 2020: Updated the schedule.
(Before) Mid October 2020
(After) To be determined
-October 2, 2020: Updated the schedule.
(Before) October 5, 2020
(After) Mid October 2020
Document Number: APIE-FY20-2090

Dear customer,

Thank you for using Yahoo! JAPAN Ads.

We will change some calculations on reporting items related to impression
share of Search Ads. Please see the following details.

Once again, thank you for using Yahoo! JAPAN Ads.

1. Product:
 Search Ads

2. Schedule:
 To be determined

3. Overview:
 The data used for calculations of the following reporting items will
 change. Currently, in addition to search sites, we are calculating the
 value based on data such as image search, in-site search, and ad
 display according to the keywords displayed on the site.
 After the effective date, the value of the reporting items will be
 calculated based only on the data of the ad displayed on the search site.
 Therefore, the value of reporting items may change after the effective

 [Reporting items to be changed]
 - Exact Match Impression Share
 - Search absolute top impression rate
 - Search top impression rate
 - Impression Share
 - Search top impression share
 - Search absolute top impression share
 - Budget Lost Impression Share
 - Search lost top impression share (budget)
 - Search lost absolute top impression share (budget)
 - Lost Impression Rate (Position)
 - Search lost top impression share (rank)
 - Search lost absolute top impression share (rank)

4. Note:
 When you create a performance report (or check the performance data
 of the Campaign Management Tool) after the effective date, the data
 values on past dates will also be changed to the values calculated
 based on the new specifications.
 Therefore, you need to get performance reports before the effective
 date if you want to check the data values calculated based on the
 current specifications.
If you have any questions, please contact us.

Yahoo! JAPAN API support team