The feedback wrap is an approach to constructing feedback in an organised and helpful way. Taken from Management 3.0 it's a technique used to help maximise the chances of feedback, whether constructive or positive, having the best impact and outcomes for both the person giving and the person receiving the feedback. Put simply, the technique helps you deliver better feedback.
The GROW model is a standard coaching technique, used to help someone decide for themselves on a way forward in the face of challenges. Coaching approaches are appropriate when the primary aim is to help an individual develop or solve a problem for themselves, or the way forward is genuinely uncertain. In other circumstances, more traditional mentoring or other techniques may be more fitting.