> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/KeywordPlanHistoricalMetrics).

Historical metrics specific to the targeting options selected. Targeting options include geographies, network, and so on. Refer to <https://support.google.com/google-ads/answer/3022575> for more details.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/common/keyword_plan_common.proto)

| Fields ||
|---|---|
| ## `average_cpc_micros` | `int64` Average Cost Per Click in micros for the keyword. |
| ## `avg_monthly_searches` | `int64` Approximate number of monthly searches on this query, averaged for the past 12 months. |
| ## `competition` | `KeywordPlanCompetitionLevel` The competition level for the query. |
| ## `competition_index` | `int64` The competition index for the query in the range \[0, 100\]. Shows how competitive ad placement is for a keyword. The level of competition from 0-100 is determined by the number of ad slots filled divided by the total number of ad slots available. If not enough data is available, null is returned. |
| ## `high_top_of_page_bid_micros` | `int64` Top of page bid high range (80th percentile) in micros for the keyword. |
| ## `low_top_of_page_bid_micros` | `int64` Top of page bid low range (20th percentile) in micros for the keyword. |
| ## `monthly_search_volumes[]` | `MonthlySearchVolume` Approximate number of searches on this query for the past twelve months. |