An insert gives you the opportunity for the reader to open a newspaper and find a loose flyer, your insert . You select the day and which message you want to have on the insert. The advantage to insert promotions is that your message will be seen by more readers than a regular newspaper ad. You can use special colors to attract attention. Before you select the insert promotion, make sure you find out how many other inserts will be in the issue you are thinking of using.
Many days have none, or only a few.
For instance, Sunday has more readers but they also have more inserts. You provide the bottom line message and let them work the listener. They know their audience, and they know your product. Most of these spots can effectively drive customers to your store or internet site. Contest, give aways, free education, free service etc.