What does a normal polygon look like?

Excuse me, could you elaborate on the appearance of a normal Polygon for me? Specifically, I'm wondering if there's a general shape or configuration that characterizes all normal polygons, or if their appearance varies based on certain factors like the number of sides they have. Could you perhaps provide an example or two to help me visualize what you mean by a normal polygon? I'm genuinely curious to learn more about this concept.