The policy of Appeasement successfully delayed the war for a few years.
It momentarily stopped Hitler's advancing when the policy was enacted.
The Allied countries were still weakened from WWI and appeasement postponed the next war so countries like England and France could become empowered again.
After seeing Chamberlain's poor governing and use of the Appeasement policy, the people would elect a new Prime Minister, Winston Churchill. He opposed appeasement and would strengthen the British morale.
Appeasement was not a solution to the brewing war and helped to cause rather than prevent it.
Appeasing Hitler would not last long and would only delay him from conquering new territory for his Reich. It also strengthened the German nationalism and Hitler's morale to continue his aggression over Europe.
Countries like Czechoslovakia, Austria, and Poland were now under Hitler control. The land occupied by these countries would be used for German military bases and concentration camps.
Chamberlains usage of appeasement did not settle well with a majority of Britain, criticizing his decision. Many assumed the prime minister was cowardly, fearing Hitler, knowing the War that was bound to occur.