Which signals are not available within AMC?

The correct answer is Ad-relevant conversions with a 60-day lookback window because within Amazon Marketing Cloud (AMC), ad-relevant conversions are typically available with a 28-day or 14-day lookback window, but not with a 60-day lookback window. The 14-day lookback window is commonly used to track ad-attributed conversions, capturing relevant customer actions that occur within that period after exposure to an ad. A 28-day window is also used for certain types of conversions, but a 60-day lookback window is not part of the standard data available within AMC for ad-relevant conversions. This limitation ensures that data remains manageable and relevant to shorter-term marketing strategies and trends.