The title of the project is important for obvious reasons. People have to know what the project is about. To get people's attention, all that is really needed is letters large enough to be seen from 30-40 feet away. However, making the title look professional is a little more involved. The title should be centered in the middle of the main board, at the top. That way, everyone can see it no matter who is standing in front of the display.
If it is half way down, it splits the main board into two parts, ruining the flow of the design:
If it is at the bottom, no one will see it, and it will go unnoticed.
Also avoid having vertical text. It is harder to read and parts of it can be obscured by people or demonstrations.