enlightening
adjective /ɪnˈlaɪtnɪŋ/
  /ɪnˈlaɪtnɪŋ/
(formal)- giving information so that you can understand something better- It was a very enlightening interview.
- A visit to her partner proved most enlightening.
- Her comments were both enlightening and thought-provoking.
- The research should be particularly enlightening about the way the virus is transmitted.