Hopefully we will also get to ask questions that are related.
We want to learn something new at the end of the project,
How will you know whether or not your project has been successful?
When we actually apply what we have learn to our other projects and real life, it shows that we have understood the lecturer/professor, and have learnt something from it.
If we also tell others about what we have learnt, it also shows that you have understood and you know how to explain to others.