For each project at the very beginning, any event will be useful, the sooner they learn about the team and the project, the better for the development itself, it is logical
At such events, people from this sphere gather. And who are interested in this question. You can extract a lot of useful information for the project.
But you need to prepare well for such events and tell them in such a way that it would be interesting for people to listen, and also to show a presentation