Final answer:
Outdoor advertising is the type of advertising that is both timely and geographically flexible.
Step-by-step explanation:
The type of advertising that has the advantages of being both timely and geographically flexible is outdoor advertising. Outdoor advertising includes billboards, transit advertisements, and other forms of outdoor signage that can be strategically placed in high-traffic areas to reach a wide audience. This type of advertising is timely because it is visible to people as they go about their daily activities, and it is geographically flexible because advertisers can choose specific locations for their outdoor ads to target specific areas or demographics.