"What does this big Red Button do?"

It starts the Server's self-destruct sequence...

No, it doesn't, but this is a very good question. cPanel is a very powerful piece of software. It manages everything that has to do with your website. If you see something that you do not fully understand, it is best to just leave it alone and ask us about it. However, if an accident were to happen you can rest assured that no harm will come to the whole system. Your website is a completely separate entity unto itself. The worst that could happen would be that you might lose a lot of very valuable information. In your e-commerce databases, for instance.

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