Types of models used to create conversion rate suggestions.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/enums/reach_plan_conversion_rate_model.proto)

| Enums ||
|---|---|
| ## `CUSTOMER_HISTORY` | Suggested conversion rate for the authenticated customer based on the previous 70 days. |
| ## `INVENTORY_AGGRESSIVE` | Suggested conversion rate based on an aggressive rate for the entire inventory. |
| ## `INVENTORY_CONSERVATIVE` | Suggested conversion rate based on a conservative rate for the entire inventory. |
| ## `INVENTORY_MEDIAN` | Suggested conversion rate based on the median rate for the entire inventory. |
| ## `UNKNOWN` | The value is unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |