You remember what you practice. So just learn the top 100 vocabulary words you'll hear ever day.
Webster's International Dictionary says that if you only learn 100 vocab words, you'll understand over 50% of what people say in Korea. To understand 100% of what people say, you need to learn 2,700 words.
So all you have to do is listen to the top 100 most popular words and you'll rapidly become familiar with 50% of what people are saying in KPOP songs, K-Dramas, and the streets of Korea.
Top 10 Most Frequently Used Korean Vocab Words
The Top 5 Most Frequently Used KPOP Vocab Words
Finally, Learn Half of What's Being Said in Korean with Just 100 Vocab Words