Final answer:
National spot advertising is a form of nonnetwork advertising that is flexible and allows for targeted geographic marketing. It is not limited to specific types of businesses and differs from local advertising by potentially covering multiple markets.
Step-by-step explanation:
The answer to the question about the characteristics of national spot advertising is that it is a type of nonnetwork advertising. National spot advertising allows sponsors to purchase ad spots on a local market basis rather than through a national network. This type of advertising enables companies to target their messages to specific markets or regions, rather than taking a one-size-fits-all approach with national network advertising. National spot advertising is not limited to specific industries such as banks or auto dealers; it can be used by various businesses aiming to reach a particular geographic audience. Additionally, it is not synonymous with local advertising; while both are geographically targeted, national spot advertising can span multiple markets rather than one single locality. Regarding flexibility, national spot advertising allows greater customization and targeting, making it a more flexible option than some other forms of traditional advertising.