Why was the german blitzkrieg so effective?

The German blitzkrieg was very effective because it was basically hit-and-run tactics. Blitzkrieg meaning lightning warfare in German. The Germans would hide out and wait for the enemy to go into their "stomach" and then strike all around them, and move back or forward or wherever the Germans were to go, and prepare for the next attack. By the time reinforcements came, all they found were the dead bodies of their allies.