If you are a returnee migrant then, you can share your experiences to other participants thus they can learn from your experience Firsthand experience is incomparable. Your fellow attendees and participants can empathize more with you who had experience on the site.
If this is your first time to migrant, you can share your insights, expectations, fears and other thoughts. Other participants may have the same insights or fears as yours. As such, these can be responded to properly by the trainer.
In other countries, participants create a social network group after the training or orientation, which could be via Facebook or WhatsApp or other means. Through these platforms, they can update one another, and share their experiences and additional information.