The type of the experiment.

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

| Enums ||
|---|---|
| ## `ADOPT_AI_MAX` | An experiment that tests how AI Max can help you engage more customers with Google AI and broad match keywords. |
| ## `ADOPT_BROAD_MATCH_KEYWORDS` | An experiment that tests how broad match keywords can impact the number of searches your ads appear in. |
| ## `AD_VARIATION` | This is an ad variation experiment. |
| ## `COMPARE_CAMPAIGNS` | An experiment that compares multiple variables across one or more campaigns, tests a mix of campaign types, and more. |
| ## `DISPLAY_AND_VIDEO_360` | This is a DISPLAY_AND_VIDEO_360 experiment. |
| ## `DISPLAY_AUTOMATED_BIDDING_STRATEGY` | An experiment that compares bidding strategies for display campaigns. |
| ## `DISPLAY_CUSTOM` | A custom experiment consisting of display campaigns. |
| ## `HOTEL_CUSTOM` | A custom experiment consisting of hotel campaigns. |
| ## `OPTIMIZE_ASSETS` | A custom experiment for optimizing assets. |
| ## `PMAX_REPLACEMENT_SHOPPING` | An experiment that tests how your Shopping campaigns perform compared to Performance Max. |
| ## `PMAX_TEXT_CUSTOMIZATION_FINAL_URL_EXPANSION` | An experiment that tests text customization and lets Google AI send traffic to relevant landing pages and generate text assets to better match search queries. |
| ## `SEARCH_AUTOMATED_BIDDING_STRATEGY` | An experiment that compares bidding strategies for search campaigns." |
| ## `SEARCH_CUSTOM` | A custom experiment consisting of search campaigns. |
| ## `SHOPPING_AUTOMATED_BIDDING_STRATEGY` | An experiment that compares bidding strategies for shopping campaigns. |
| ## `SMART_MATCHING` | DEPRECATED. A smart matching experiment with search campaigns. |
| ## `UNKNOWN` | The value is unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |
| ## `YOUTUBE_CUSTOM` | A custom experiment consisting of Video campaigns. |