Here's why:
* Frequency: It ranks highly in word frequency lists, indicating its regular use.
* Versatility: "Common" has multiple meanings and can be used as an adjective, noun, or adverb, making it adaptable to various situations.
* Essential Vocabulary: It's considered a basic word in English, essential for understanding and communicating effectively.
You'll encounter "common" in countless contexts, from everyday conversations to formal writing.