A forecast will populate as you build or edit a campaign, estimating the total household audience size, along with your campaign's reach and frequency.
Find it on the top right of any campaign page:
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This tool maps campaign parameters β schedule, location, audience, and delivery settings β to available inventory. It automatically updates when campaign parameters change, so feel free to play around with it until you find an ideal fit. 
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The forecaster includes these estimated metrics:
- Target audience size (households): the total amount of homes within the selected location and audience targeting. 
- Estimated impressions - Daily: the number of Impressions you may receive daily based on your target audience, selected placements, campaign length, and budget. Actual results may be outside of this range. 
- Estimated impressions - Lifetime: the number of Impressions you may receive in the campaign's lifetime based on your target audience, selected placements, campaign length, and budget. Actual results may be outside of this range. 
- Estimated reach: The number of households you may reach based on your target audience, selected placements, campaign length, and budget. Actual results may be outside of this range. 


