All inventory available through Widespace is segmented into IAB Categories. Contextual targeting allows you to target sites and apps within a specific media segment, such as Female, News or Travel. You can chose to run on a single vertical, combine several verticals, or go across all inventory but exclude a specific vertical.
Available verticals might differ from market to market.
By default, Widespace recommends to run on the entire network to maximize the potential of its recommender system and brand algorithm. However, you can select vertical targeting to run your flight on specific verticals (at least one needs to be selected).