AI-generated Key Takeaways
- 
          Frequency cap keys are a group of fields used for a frequency cap, with no more than one frequency cap sharing the same key. 
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          Key fields include level,event_type,time_unit, andtime_length, which define how the cap is applied.
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          The levelspecifies where the cap applies (e.g., ad group ad), and theevent_typeindicates the event it applies to (e.g., impression).
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          time_unitandtime_lengthtogether define the duration of the frequency cap.
A group of fields used as keys for a frequency cap. There can be no more than one frequency cap with the same key.
| Fields | |
|---|---|
| 
 | The level on which the cap is to be applied (for example, ad group ad, ad group). The cap is applied to all the entities of this level. | 
| 
 | The type of event that the cap applies to (for example, impression). | 
| 
 | Unit of time the cap is defined at (for example, day, week). | 
| 
 | 
 Number of time units the cap lasts. |