`口语` is a term you'll encounter constantly in your learning journey.
In Language Learning: Your teacher will have “口语课” (kǒuyǔ kè, speaking class). You'll look for a language partner to “练习口语” (liànxí kǒuyǔ, practice speaking). Your goal is often to make your `口语` more “地道” (dìdao, authentic) or “流利” (liúlì, fluent).
In Daily Life: When Chinese people compliment a foreigner's language skills, they will often say, “你的口语很好!” (Nǐ de kǒuyǔ hěn hǎo! - Your spoken Chinese is very good!).
In Professional Settings: A job posting might require “良好的英语口语能力” (liánghǎo de Yīngyǔ kǒuyǔ nénglì - good English speaking ability). It refers to practical conversational skills, not just the ability to read and write.
Formality: While `口语` is by nature less formal than `书面语`, there are still levels of formality within it. The `口语` you use with your boss is more polite and structured than the `口语` you use with a close friend, which might be filled with slang (俚语, lǐyǔ) and filler words.