Here are a few options for the WordPress post_tag description, keeping in mind brevity and clarity:

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

> 探索芳香療法的世界，了解精油的益處與應用。
> (Explore the world of aromatherapy, understand the benefits of essential oils, and their applications.)

**Option 2 (A Little More Descriptive):**

> 關於芳香療法的一切：從精油的選擇到如何在家中輕鬆使用，體驗身心靈平衡的奇妙旅程。
> (Everything about aromatherapy: from choosing essential oils to how to easily use them at home, experience the wonderful journey of mind-body-spirit balance.)

**Option 3 (Focusing on Benefits):**

> 芳香療法：緩解壓力、提升情緒、改善睡眠，體驗天然香氛的舒緩力量。
> (Aromatherapy: Relieve stress, lift your mood, improve sleep, experience the soothing power of natural fragrances.)

**Option 4 (SEO Focused):**

> 芳香療法 – 探索精油的治癒力量，學習芳香療法的基礎知識和應用，改善健康與生活品質。
> (Aromatherapy – Explore the healing power of essential oils, learn the basics of aromatherapy and its applications, improve health and quality of life.)

**Choosing the best option:**

* **Consider your target audience:** Who are you trying to reach? Are they beginners or experienced aromatherapy enthusiasts?
* **Think about the tone of your blog:** Is it formal or informal?
* **Optimize for search:** Use keywords like “精油” (essential oils), “舒緩” (soothing), and “健康” (health) if appropriate for your blog.

When adding it to your WordPress tag, the description will likely be displayed on a tag archive page, so consider how it will appear alongside your blog posts. I recommend going with **Option 2 or Option 4**. Good luck!