This can be particularly helpful when you’re hanging something heavy on the wall, such as a shelf or a TV mount. By finding the center point, you ensure that your item is properly supported by both studs, which makes it less likely to fall or pull away from the wall.
When they make lollipops, hot liquid candy is poured onto the stick. That little hole helps the candy grip onto the stick so it doesn’t fall off easily. This way, it stops you from accidentally swallowing the candy whole and choking on it.