Here are a few description options for the WordPress post tag “日常用語” (Day-to-Day Language) in Traditional Chinese, with varying levels of detail and focus:

**Option 1 (Concise & Direct):**

> 用於涵蓋日常生活中的常用詞彙、短語、表達方式。

**(Translation: Used to cover commonly used vocabulary, phrases, and expressions in daily life.)**

**Why this works:**

* Simple and easy to understand.
* Clearly defines the tag’s purpose.

**Option 2 (Slightly More Descriptive):**

> 收集有關日常生活溝通的詞彙：從基本問候到常見話題，以及各種情境下的常用表達。

**(Translation: A collection of vocabulary related to daily life communication: from basic greetings to common topics, and common expressions for various situations.)**

**Why this works:**

* Provides more context about the content covered.
* Hints at different types of content (greetings, topics, expressions).

**Option 3 (Focus on Language Learners):**

> 提供學習和理解日常中文所需的字彙、短語和用法。適合中文學習者，幫助他們更好地應付日常對話。

**(Translation: Offers vocabulary, phrases, and usages needed for learning and understanding everyday Chinese. Suitable for Chinese learners, helping them better handle daily conversations.)**

**Why this works:**

* Specifically targets a potential audience (language learners).
* Highlights the practical benefit of using the tag.

**Option 4 (General & Encouraging):**

> 探索充滿活力的日常口語世界！在這裡，您將找到各種在日常生活中常碰到的用語，幫助您更流利、更自信地用中文溝通。

**(Translation: Explore the vibrant world of everyday spoken language! Here, you’ll find all sorts of terms commonly encountered in daily life, helping you communicate in Chinese more fluently and confidently.)**

**Why this works:**

* More engaging and welcoming tone.
* Emphasizes the user’s goals (fluency, confidence).

**How to Choose:**

* **Consider your target audience:** Who are you writing for?
* **Think about the type of content you’ll be tagging:** What kind of posts will fall under “日常用語”?
* **Keep it concise:** WordPress tag descriptions should be relatively brief.

I recommend choosing the option that best reflects the content you’ll be creating and the audience you want to reach. For a general audience, either **Option 1 or 2 would be a good starting point**. If you’re focusing on learners, **Option 3 is ideal.** And if you want to create a sense of invitation, then **Option 4**.