Here are a few options for a WordPress post tag description for the tag “為什麼做夢” (Why do we dream) in Traditional Chinese, with slightly different focuses:

**Option 1: General and Informative**

> 探索夢境的奧秘，揭示夢的成因、夢境的意義、以及夢對我們身心健康的影響。 了解更多關於夢的科學、心理學，以及如何解讀你的夢境。 (Explore the mysteries of dreams, revealing their causes, meaning, and impact on our physical and mental well-being. Learn more about the science of dreams, psychology, and how to interpret your own dreams.)

**Option 2: Focus on Exploration**

> 解開夢境的密碼！ 深入研究不同夢境的意象、夢境中所隱藏的秘密、以及夢與我們日常生活之間的聯繫。 (Unlock the code of dreams! Delve into the imagery of different dreams, the secrets hidden within them, and the connections between dreams and our daily lives.)

**Option 3: Simplified & Engaging**

> 想知道你為什麼會做夢嗎？ 一起探索夢的世界，了解夢的奧秘，以及夢境背後的意義。 從科學角度到心理層面，我們都會一一探討。(Wondering why you dream? Let’s explore the world of dreams together, understanding their mysteries and the significance behind them. From a scientific perspective to a psychological level, we’ll explore it all.)

**Option 4: Focusing on practical application**

> 夢是潛意識的窗口。 透過這標籤，你會學到如何了解你的夢，它們可能代表什麼意義，以及它們能幫助你更好的了解自己。 (Dreams are a window into the subconscious. Through this tag, you’ll learn how to understand your dreams, what meanings they might represent, and how they can help you better understand yourself.)

**Key Considerations when choosing:**

* **Target Audience:** Who will be reading your blog? Choose the descriptive language that best resonates with them.
* **Content of Your Posts:** Does your blog focus on scientific explanations, psychological interpretations, personal dream journals, or a mix? The description should align with your content.
* **Keyword Density:** While not the primary focus, consider including related keywords like “夢境解析” (dream interpretation), “潛意識” (subconscious), “夢的心理學” (psychology of dreams) if relevant to your content.
* **Brevity:** While WordPress allows longer descriptions, concise and engaging descriptions often perform better. Try to convey the essence of the tag within a few sentences.

When adding to your WordPress tag, you will typically go to the “Tags” section and edit the tag, filling in the “Description” field with the chosen text. Good luck!