Not only English but with all aspect new to us that is needed to be memorize. Sometimes memorization is not a good tool to master one thing, rather it is with constant practice that makes it close to perfection. In short "We should live on what we know." It means we should use new knowledge in our everyday living so that we may realize the purpose why we study those things.

Hello, my friend,a good memory is important not only when you are studying but always in everything.

Hello Elvis, A good memory will help you acquire more vocabulary in shorter time. It enhances your written skills making it easier for one to write correctly with a minimum of spelling mistakes. It helps also memorizing the correct pronunciation of words. This goes for learning English as well as other languages.