You might have missed it at the start, but when they first aim the kinsect at the monster, a little red diamond appears at the bottom of the targeting reticule. The suggestion is that you’ll be able to tell which buff a body part gives BEFORE you launch your kinsect, taking out a lot of the guess work and making it more approachable for new players.
I did miss it, but it's fairly useless since shooting the Kinsects at every body part is generally pretty easy. It's main use will be for people that never went to the training arena to have it explained to them.