Possible match types for a keyword triggering an ad.

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

| Enums ||
|---|---|
| ## `AI_MAX` | Match type for AI Max Search. |
| ## `BROAD` | Broad match. |
| ## `EXACT` | Exact match. |
| ## `PHRASE` | Phrase match. |
| ## `UNKNOWN` | Used for return value only. Represents value unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |