How to choose the stage height?

Celebration stage generally has three specifications: 500px height, 1000px height and 1500px height. A stage with a height of 500px is generally suitable for small and medium-sized activities or indoor activities. It is likely that everyone will ask, why is the height of the stage related to the size and venue of the event? Why do small and medium-sized activities choose to build a stage with a height of 500px? Generally, I don't want to keep too much distance from the audience, such as product promotion activities, birthday paty, internal annual meeting and so on. Therefore, I hope to get in close contact with the audience conveniently, and I don't want to distance myself from the audience, so I will use a stage that is not very high, and the stage with a height of 500px is the most suitable. Why did indoor venues choose to build a 500px stage? General hotels or ordinary rooms have certain height restrictions. If the height of the stage is too high, people on the stage will be too close to the roof, which is easy to feel oppressive and uncoordinated.