Here’s a description for the WordPress post tag “discount” in Traditional Chinese, aimed at being concise and relevant:

**Description:**

**優惠 (yōu huì) – 此標籤涵蓋所有涉及打折、促銷、減價等優惠活動的文章。**

*(Translation: “Discount (Offers) – This tag covers all articles related to discounts, promotions, markdowns, and other special offers.”)*

**Why this works:**

* **”優惠 (yōu huì)”** is the most common and widely understood word for “discount” or “special offer” in Chinese. It’s clear and concise.
* **The added explanation** clarifies the scope of the tag, showing that it includes sales and bargains.
* **The tone is direct and informative,** perfect for a tag description.
* **Uses Chinese characters** which is the most proper form to be used.

**Another option, slightly shorter in description:**

**Description:**

**優惠 (yōu huì) – 打折、促銷、減價等優惠資訊。**

*(Translation: “Discount (Offers) – Discount, promotion, markdown and other offers information.”)*This one is shorter and keeps all the main concepts.

Remember to add this to your WordPress’s tag settings under the “Description” field when you edit the post tag “discount”. You can copy and paste either of these options in.