The moment the mediator has assessed the basics, it is where you will get a chance to make a short statement about your case. Then, the mediator will likely to ask some clarificatory questions to get some facts straight. The mediator may also go back to the statements you have made, to make sure that all parties in the case have understood what you really mean to say.
The next step is the assessment of the parts where both of the spouses agree, and on the parts where there is still some slight differences. The moment all parties get a sense of the direction where the process is going, everything else will follow quite smoothly in arriving at a fair and full agreement.