Giving and getting feedback is part of effective communication. Giving feedback is a good way to encourage and motivate others. Getting feedback gives people the opportunity to reflect on their learning/ teaching process or their performance at work.
What does feedback mean?
According to Cambridge Dictionary, feedback is:
“an opinion from someone about something that you have done or made”
If there are things that need to be improved you can provide constructive criticism to help others advance in their learning/ teaching process or careers.
The purpose of giving feedback and constructive criticism is to lead others to improve in the longer term. Therefore, when giving feedback it is important that you avoid judging or giving negative comments or remarks.
Here you have some sentence starters that you can use to give positive feedback:

PRACTICE TIME
Imagine that you are a manager in a tech company. One of your assistants has developed a software that will help the company save a lot of money. However, the software is not user friendly (difficult to use). Your assistant has presented his/ her project in the last weekly meeting. Give him/ her some feedback.
Write your feedback in the comments below.