Reflecting on a work experience is a crucial piece to personal growth and bettering yourself for your next placement. Kolb’s experiential learning style theory explains the four stage learning cycle (starting with a Concrete Experience): 

The reflective observation piece is the bridge that will allow you to conclude and talk about your placement while drawing on key learning moments that shaped your experience. Going through the reflection process will also allow you to assess a situation and identify what you did well and how you could do things better.