Which tool would an advertiser utilize to forecast reach on Facebook?

The choice to utilize "Estimated daily results" for forecasting reach on Facebook is appropriate because this tool provides advertisers with a projected estimate of how many people will see their ads each day. It integrates data from the targeted audience, allowing advertisers to understand potential reach, impressions, and outcomes based on the allocated budget and selected targeting parameters. This information is key for advertisers as it helps in assessing the effectiveness and potential impact of a campaign before it goes live.

While audience insights can offer extensive information about the demographics and behaviors of an audience, it doesn’t provide direct projections of reach for specific campaigns. The ad preview tool allows advertisers to view how their ads will look but does not provide forecasting metrics. Campaign performance metrics focus on analyzing past performance rather than predicting future performance, which is not relevant for forecasting reach specifically.