What feature allows you to measure your impact, view complete metrics, unlock conversion optimization, and fine tune your campaigns with deeper insights?

Conversion Tracking is the correct answer because it directly enables the measurement of campaign impact, provides complete metrics on user actions, and unlocks conversion optimization by showing which ads lead to desired outcomes. This allows advertisers to fine-tune campaigns for better performance. Campaign Demographics provides information about the audience reached, but not their actions or conversions. Audience Insights offers general data about potential audiences, not specific campaign performance or conversions. The statement that no features provide this data is incorrect, as Conversion Tracking is specifically designed for these purposes.