A reflective essay is essentially your thoughts on a subject - specifically what you have learned.
The reflective essay gives you an opportunity to reflect and discuss your achievements while completing the project. Your work on the project is not completed till you evaluate your work objectively in a reflective essay.
An essay is a piece of writing, usually from an author's personal point of view. The essay must be well structured (i.e. organized) and presented in a way that the reader finds easy to follow and clear: it must look tidy and not present any obstacles to the reader. It must have a clear readable interesting style.