The dissertation is where you communicate the findings and professional insights of your research project. It is not simply a long essay, nor is it an extended professional report. The project should show that you know your subject, the key facts and different and/or conflicting points of view, how it relates to wider concepts in the field, but it will also advance your findings and your point of view arising from your own research. It should show mastery of your topic, and also of scholarly method. Your student notes have required details on format, layout, deadline etc, and dissertations of students from previous years will give you a good feel for the level of knowledge expected. I’ve added some links below from the UK and USA which will give you a more rounded idea of the expectations, and some useful guidance on planning, structuring, writing, and completing it on time.