Hitler’s decision to temporarily halt the advance of his army arguably saved thousands of Allied soldiers on the beach and nobody to this day is entirely sure why he did it (via Mental Floss). His generals protested the move precisely because it gave the British desperately needed time but Hitler overruled them. One theory asserts that Hitler attempted to use this as an olive branch toward the British, whom he initially wished would either join him or sign an armistice (via Historic UK). That is unlikely though since Hermann Göring’s Luftwaffe was turned to in lieu of ground forces during this period. 

While the planes failed to do enough damage, it was not for a lack of trying as they claimed hundreds of lives on the beach (via History.com). A more reasonable explanation is that Hitler was concerned about over-extension. His armored units were in prime position to move on the British, and in theory, could have wiped them out. However, this was only possible because they had sped far ahead of the German infantry. If the advance had been carried out per the wish of Hitler’s generals, then the vehicles may have been overrun by the British, especially as their crews were exhausted after the often drug-fueled push (via Time.com).