> [!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/UserListStringRuleItemInfo).

A rule item composed of a string operation.

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

| Fields ||
|---|---|
| ## `operator` | `UserListStringRuleItemOperator` String comparison operator. This field is required and must be populated when creating a new string rule item. |
| ## `value` | `string` The right hand side of the string rule item. For URLs or referrer URLs, the value can not contain illegal URL chars such as newlines, quotes, tabs, or parentheses. This field is required and must be populated when creating a new string rule item. |