Organization is everything
The structure and organization of your paper is as important as the content. You may have a great argument but if it isn't organized, your ideas won't be understood. To write an argument, you need to provide clear and relevant evidence. This doesn't happen by accident.
By thinking about and completing the first 3 steps of the research process, you should have a pretty good idea what you want your paper to claim. This step is about distilling your research findings into a statement, a thesis statement, and then proving your thesis with evidence.
During this step, you will organize the information that you have found.