Let me not go too far with this and give you an awesome example nearby me. Here in India, we have Dalal Street.

There, the people used to deal with each other through signs (via their hands and fingers to determine how much they are buying or selling for which stock). Then came the online share trading platform, which increased a lot of convenience for those standing in huge crowd now able to do the same thing with a lot more advanced features from the comfort of their home. If internet wasn't there, how would that become possible? Just think.