How was the german military strategy blitzkrieg important during world war ii?

The blitzkrieg or "Lightning War" was a German tactic, the use of a combination of mobile forces of aviation, artillery, tanks and infantry, mainly, which created a complete disorganization among hostile forces. Successful execution of this tactic leads to short military actions that saves people's lives and limits the expenditure of artillery. The implementation of this tactic enabled the successful conquest of Belgium, the Netherlands and France in Europe, and also used Rommel during a campaign in North Africa.

500 books can be produced by one man and a printing press within 5 months, while a copyist can only produce one in the same amount of time

you really can't answer this on your own?