O que significa "that behaviour" in "if we stick with blur words, they actually won't have any clue particularly what to do going forward to keep repeating that behavior." (link to video to follow) ?

What I'm struggling to grasp is what "that behaviour" is specifically referring to.
Is it the positive behaviour that the feedback giver would want to complimenting on and the receiver of feedback to keep repeating? Or is it a negative behaviour or something else?

https://youtu.be/wtl5UrrgU8c?t=199

The full paragraph:
The second part of the feedback formula is going to be giving your data point. Here, you should name specifically what you saw or heard, and cut out any words that aren't objective. There's a concept we call blur words. A blur word is something that can mean different things to different people. Blur words are not specific. So for example, if I say "You shouldn't be so defensive" or "You could be more proactive." What we see great feedback givers doing differently is they'll convert their blur words into actual data points. So for example, instead of saying, "You aren't reliable," we would say, "You said you'd get that email to me by 11, and I still don't have it yet." Specificity is also important when it comes to positive feedback, and the reason for that is that we want to be able to specify exactly what we want the other person to increase or diminish. And if we stick with blur words, they actually won't have any clue particularly what to do going forward to keep repeating that behavior.

Many thanks in advance!