Well, this is an important question. Why? The answer is very simple: my time, your time, our time. And we must pay attention to the spam and the lost money.
But I think the infographic below explains better:
Created by: OnlineITDegree.net
Madalin Blidaru
Sunt Mădălin Blidaru. Dacă vrei să îmi transmiți ceva, mă găsești la madalin [at] blidaru [dot] net sau pe diferite rețele sociale.