Here’s a description for a WordPress post tag using traditional Chinese and focusing on clarity and relevance:

**Description Option 1 (Concise & Practical):**

> 包含關於自然人憑證（Taiwan eID）的文章。 涵蓋申請、使用、常見問題、及相關數位身份認證等資訊。 For content related to the Taiwan eID, including application, usage, FAQs, and related digital identity verification.

**Why this works:**

* **Clear & Direct:** Explains the core meaning of the tag (articles about the digital certificate).
* **Keywords:** Uses key terms like “申請” (application), “使用” (usage), “常見問題” (FAQs), and “數位身份認證” (digital identity authentication/verification) which users might search for.
* **Brief:** Concise enough to be helpful without being overwhelming.
* **Includes English Translation (Optional):** Helpful for bilingual users or anyone unfamiliar with the concept but familiar with English. This assumes your website is in English or caters to a mixed audience. You can remove the English part if your site is exclusively in Chinese.

**Description Option 2 (Slightly More Detailed):**

> 探索關於自然人憑證的各種資訊。 從申請流程到如何使用於線上報稅、政府服務、網路銀行等，我們提供精選文章，協助您了解數位身分證的應用。 包括安全注意事項、身份驗證技巧、和最新相關消息。 Explore various information related to citizen digital certificates. From application procedures to how to use them for online tax filing, government services, online banking, etc., we provide curated articles to help you understand the applications of digital IDs. This includes security precautions, identity verification techniques, and the latest related news.

**Why this works:**

* **Comprehensive:** Touches on a wider range of topics related to the certificate use, explaining its uses.
* **Action-Oriented:** Highlights the benefits of understanding the topic (e.g., accessing online services).
* **Keywords:** Similar to Option 1, covering application and uses.
* **Security Notes:** Provides added value.
* **Includes English Translation (Again, optional):** Again, the English can be omitted if not targeted audience.

**How to use in WordPress:**

1. **Login to your WordPress admin dashboard.**
2. **Go to “Posts” -> “Categories” or “Tags”** (Depending on whether you use tags or categories. Tags are generally better for this purpose.)
3. **Find the “自然人憑證” tag.** If you don’t have it, create a new tag.
4. **In the “Description” field, paste one of the descriptions above.**
5. **Click “Update” or “Save”.**

Choose the description that best fits the overall style and focus of your website. The key is to provide a clear and relevant explanation of what content tagged with “自然人憑證” is about.