Why was the blitzkrieg effective?

The Blitzkrieg was mostly effective because it took countries by surprise. It was a new tactic of war using mechanized warfare.

The blitzkrieg, which is German for "lightning war," was an effective German strategy in World War II because it took full advantage of the new ideas of mechanized warfare with bombers, fighter planes and tanks to soften up the enemy and create terror before sending in infantry troops. This caught many countries off guard because they were accustomed to the more traditional tactics used in World War I.