Target by market Major retailers and other advertsiers use pre-printed inserts to market their products and services to areas that represent the greatest sales potential. And readers consider the Chicago Tribune as a key source for insert advertising. Our advertising base includes department stores, discount stores, local retailers, grocery stores, and drug stores. Inserts regularly impact sales - it's a proven advertising medium. They also allow for demographic and psychographic targeting. Target by age, household income, and education as well as by lifestyle or shopping behavior. Cover the entire market or develop unique advertising strategies for individual store locations or special events and promotions when you choose from over 300 ZIP codes. Creative flexibility allows you to format your inserts, page count or color to attract varying customer groups. Available Wednesday, Thursday, Friday, and Sunday in the newspaper and MidWeek and on the Weekends in our Local Values shared mail product.