Completing is the last stage of the writing process, why is it important?

     I believe that the stage of "completing" is where one finalizes what was written and gives a closure to the piece. In this step, the writer should check for any errors, may it be of spelling and grammar or any divergence from the initial objective that the writer had set out to meet. The stage of "completing" is basically for proof reading and editing before disclosing the written piece.