It helps the receiver grow. If they want to. It’s not the restating of praise with ever-expanding superlatives. It’s not merely appreciating what’s good and wonderful.
First, understand the objective and then consider in conjunction with the recipient whether it has been achieved. Where could it be improved to increase impact, speed, or experience?
Celebrate the good. Give specific ideas relevant to the context, to make it better.
Likely, above is not an indication of your average experience. People either err to the side of soft and fluffy. This makes you feel great but is not very useful. Alternatively, they focus on the issues without acknowledging the victories. This is useful but makes you feel inadequate. It easily destroys any energy to pursue the improvements (since you have to change everything anyway).
Good feedback is an art we master over time if we pay attention.
When receiving, remember the giver is also learning. Interpret the feedback through the filter of the ideal.
Constructive feedback is always your responsibility, no matter on which end you stand.