The Map Name appears in the left portion of the white bar above the map. This is the name of the audience on which it is based.
To the right of the name are the Age and Gender Filters. You can narrow the audience (or widen it if the audience has already been narrowed) by adjusting these filters. The map will change to reflect any filters you apply.
Below the map name is an area where you can access the Affinity Key by hovering the mouse over it. The Affinity Key shows the range of colors from red to blue that indicate the affinity score of each cell.
The Audience Data is presented in columns and rows. The columns represent the genders and various age groups. The first column represents the entire population of the selected Audience (i.e. male and female, all age groups). The rest of the axis is portioned off between Men and Women. Each gender has an All column, followed by a column for each age grouping: 18-24, 25-34, 35-44, 45-54, 55-64, and 65+.
NEXT: Learn how to interpret your map.