Explosive shells are a type of ammunition designed to explode upon impact or after a short delay. They are typically used in artillery and naval guns, delivering a powerful blast that can damage or destroy targets. The shell's casing is filled with explosives, and it often contains a fuse that triggers the explosion. These shells come in various sizes and types, including high-explosive shells and fragmentation shells. High-explosive shells are designed for maximum destruction, while fragmentation shells scatter shrapnel over a wide area, increasing the likelihood of hitting multiple targets. Both types play a crucial role in modern warfare.