How many people are likely to see your ad? The visualization helps answer this question. I stated by investigating the four option categories : no visualization, categorical, ordinal, interval. After investigating a few formats in each category we settled on an "ordinal" approach. I generated a few options and tested two with users : Purple people, and the Target. The target tested better, and afforded us the opportunity to persent broad reach and focused reach in a postive perspective - so this is the option we moved forward with.