Document Display: The most common use is pinning memos, calendars, or photos to soft-surfaced boards.

Mapping: Their small size and variety of colors make them ideal for marking locations on wall maps without obscuring the details underneath.

Temporary Fastening: They provide a quick, non-destructive way to hold lightweight materials together or against a wall.

Surface Compatibility: Push pins are intended for use on porous surfaces (cork, foam, or soft wallboard). They are generally not suitable for hard surfaces like drywall, plaster, or hardwood, as the needle can bend or break.

Safety: Because they possess sharp points, they should be stored in containers (like the ones shown in your previous images) when not in use to prevent injury.

Capacity: They are not designed to support heavy items; attempting to hang heavy objects can cause the needle to slip or the head to crack.