What action should you take when optimising a campaign to drive conversions faster?

The selection is correct because tracking lighter actions—such as "add to cart," "site visits," or "newsletter sign-ups"—provides a higher volume of data points that allow Google's machine learning algorithms to identify patterns of intent more quickly than if the system were waiting only for rare, bottom-funnel "hard" conversions. In the early stages of a campaign or when the primary conversion volume is low, these micro-conversions serve as critical "stepping stone" signals, helping the Smart Bidding strategies like Target CPA or Maximize Conversions understand which user profiles are most likely to progress through the sales funnel. By enriching the data set with these more frequent signals, the algorithm can optimize your bids with greater precision and speed, effectively shortening the "learning phase" of the campaign and driving more efficient performance at a faster rate than a campaign focused solely on a single, final purchase event.