Create a Google Ads experiment in SETUP status. Step 1 of 5 — next call addExperimentArms with one control + one treatment arm. Type `SEARCH_CUSTOM` for general search experiments (compare ads/keywords/landing pages); `SEARCH_AUTOMATED_BIDDING_STRATEGY` to compare bidding strategies on the same campaign. The experiment doesn't serve traffic until scheduleExperiment is called. Returns experimentResourceName.
Connector