Here are a few options for a WordPress post_tag description for “行動驗證” (Xíngdòng Yànzhèng, which translates to “Action Verification/Authentication”) in Traditional Chinese, with slightly different nuances depending on the context:

**Option 1: General & Concise**

* **Description:** 確認您是真實用戶的程序，例如密碼、二因素驗證和生物辨識。 (Confirm the process of verifying you are a real user, such as passwords, two-factor authentication, and biometrics.)
* **Keywords:** 驗證, 安全, 密碼, 二因素驗證, 生物辨識 (Verification, Security, Passwords, Two-Factor Authentication, Biometrics)
* **Use Case:** Good for a broad understanding of what the tag represents.

**Option 2: Focus on Online Security**

* **Description:** 用來保護您的線上帳戶和資料安全的行動驗證方法。 (Action verification methods used to protect your online accounts and data security.)
* **Keywords:** 線上安全, 保護, 帳戶, 資料, 密碼 (Online Security, Protection, Accounts, Data, Passwords)
* **Use Case:** Suitable if the posts frequently discuss online security threats and solutions.

**Option 3: Technical & Detailed**

* **Description:** 從簡單的密碼到多重驗證(例如簡訊驗證碼、App驗證)，確認用戶身分的技術與流程。 (The techniques and processes to confirm user identity, ranging from simple passwords to multi-factor authentication (e.g., SMS verification codes, App verification).)
* **Keywords:** 技術, 流程, 多重驗證, 簡訊驗證碼, APP驗證 (Technology, Processes, Multi-Factor Authentication, SMS Verification Codes, App Verification)
* **Use Case:** Best for a technical blog or one covering the implementation aspects of action verification.

**Option 4: User-Focused & Benefit-Oriented**

* **Description:** 確保您帳戶安全又能順暢使用的關鍵步驟。了解如何設定和管理行動驗證，為您的線上生活增添安全保障。 (The key steps to ensure the security and smooth use of your account. Learn how to set up and manage action verification to add security to your online life.)
* **Keywords:** 帳戶, 安全, 線上生活, 設定, 管理 (Accounts, Security, Online Life, Setup, Management)
* **Use Case:** A good choice if aimed at a general audience or those who want to understand how action verification improves their user experience.

**Choosing the Best Option:**

Consider the following when choosing the best description:

* **Your Blog’s Target Audience:** Who are you writing for?
* **The Content of Your Posts:** What specific aspects of action verification do you primarily cover?
* **The Overall Tone of Your Blog:** Is it technical, informative, or user-friendly?

I recommend tailoring the keywords and description to **your specific content and audience** for the best results in terms of SEO and user understanding. You can also use a combination of the options to best capture the scope of the tag.