Here are a few options for the WordPress post tag description, keeping in mind brevity and clarity, in Traditional Chinese:

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

> 指考 (大學入學指定科目考試) 相關資訊。
> *(zhǐkǎo (dàxué rùxué zhǐdìng kēmù kǎoshì) xiāngguān zīxùn.)*
> *Translation: Information related to the University Entrance Examination Subject Test (GEPT).*

**Option 2 (Focus on Purpose):**

> 關於指考的最新消息、備考策略、歷屆試題等，助您順利應試。
> *(guānyú zhǐkǎo de zuìxīn xiāoxī, bèi kǎo cèlüè, lìjiè shìtí děng, zhù nín shùnlì yìngshì.)*
> *Translation: Latest news, preparation strategies, past exam questions, etc., related to the GEPT, to help you succeed in the exam.*

**Option 3 (Emphasis on Target Audience):**

> 專為準備指考的考生與家長而設，提供實用的考試資訊與資源。
> *(zhuān wèi zhǔnbèi zhǐkǎo de kǎoshēng yǔ jiāzhǎng ér shè, tígōng shíyòng de kǎoshì zīxùn yǔ zīyuán.)*
> *Translation: Designed for students and parents preparing for the GEPT; providing useful exam information and resources.*

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

> 指考相關內容。
> *(zhǐkǎo xiāngguān nèiróng.)*
> *Translation: Content related to the GEPT.*

**Which to choose?**

* **Option 1** is a good, safe, and informative choice for most websites.
* **Option 2** is useful if the website offers a lot of exam preparation resources.
* **Option 3** is best if the website is focused on helping students and parents.
* **Option 4** is the shortest and works if you want simplicity.

Consider what your site covers about the “指考” exam when making your final decision. Remember to use Traditional Chinese characters, no matter your choice!