To create a forecast for their new Video awareness campaign,a marketing manager used Reach Planner. But the results of that campaign were very different from the media plan numbers provided by the Reach Planner forecast.Why was there such a significant mismatch between the campaign results and forecast data?

The most likely reason for the mismatch between the campaign results and forecast data is that the marketing manager built a campaign that didn't match the plan settings in Reach Planner.Reach Planner provides forecasts based on the specific settings and inputs given by the user.If the actual campaign settings deviate from what was input into Reach Planner, then the real-world results can differ significantly from the forecast.It's crucial to ensure that the actual campaign aligns with the planned settings to achieve expected results.