@sealabcore for more information about targeting types and their corresponding values, you should take a look at our targeting documentation. To target lookalikes for your tailored audience you just need to enable TA expansion.
In short, the basic flow is as follows:
- Create your TA list and wait for processing to finish.
- Call GET /targeting_criteria/tailored_audiences to get the targeting value for the new audience.
- Call POST /targeting_criteria to target a specific line item with your new audience.
When you call POST /targeting_criteria you’ll need to provide an eligible line item and use the targeting_type=TAILORED_AUDIENCE and the targeting_value you pulled for your audience in the second step above. To enable tailored audience expansion (lookalikes) you’ll also need to set tailored_audience_expansion=true.
There’s also a general FAQ for tailored audiences available here.