This strip of gold-plated target pads is used when you want to have a solid pogo-pin connection point on your PCB. Note that these are not springy - that would be the pogo half you provide. Instead, this is what the pogo touches to make a connection. The top surface has a concave bowl so that the tip of a spear/pointy pogo will center nicely.

Pogo pins are little spring-loaded contacts, very handy for making jigs or making momentary (but electrically solid) contacts. We use them by the dozen to make programming and testing jigs, but they're also handy if, say, you want to JTAG program a board you can't solder headers to. We sell pogo pins here if you need, any of them will poke nicely into this strip.

Comes with a single in-line 9-pin pogo-target header with 0.1"/2.54mm spacing. You could snap or cut these to make smaller bits, but you may lose a pogo target in between, so keep that in mind.