Multitasking Questions

Which is the main cause of our tendency to multitasking?Why are we obsessed with no loosing a moment in our lifes?What happens in our brain when we receive shinning notifications?What is mopre producting, focusing on one task or on some at the same time?What is meltbox?Which are the better tactics to avoid multitasking and focusing on certain goals?When should you check your email?