It is harder to understand Spoken English than Written English. There are two reasons for this:

- Speech is continuous There are no pauses between words, so when you don’t understand something, you don’t know if it’s one word, two words, or maybe part of a word.
- People sometimes talk fast, unclearly or in regional accents.

It is also generally difficult to learn vocabulary from audio content. If you hear a new word, it may be difficult to look it up in a dictionary because you will have to stop the recording (which is inconvenient and sometimes impossible) and guess the spelling (which may be difficult). Even though it is difficult, knowing Spoken English is a hugely important with many advantages over reading.