Rehearsals are important to achieve the perfect result when performing the final take. They ensure that everything goes smoothly and any unforeseen problems are caught beforehand. Rehearsals also have a theme and a proper manner. In the correct order, first you have to do block rehearsal.
Then you have to perform tech rehearsals so that everything is working in order. After that, you need to ascertain if the dresses are functioning. This is done in a dress rehearsal. This helps overcome any possible mishaps and minimizes problems so that the final run is perfect. Many professionals follow this routine to avoid problems.