Here are a few options for the WordPress post_tag description, in Traditional Chinese, catering to different lengths and focuses:

**Option 1: Concise & Direct**

* **Description:** 忘記了網站的密碼？ 這裡提供相關的協助與解決方案。
* **Translation:** Forgot your website password? Solutions and assistance are available here.

**Option 2: Slightly More Explanatory**

* **Description:** 網站登入遇到密碼問題嗎？ 找尋密鑰回復、更改密碼或重置密碼的教學和資源。
* **Translation:** Having password issues when logging into the website? Find tutorials and resources for password recovery, password changes, or password resets.

**Option 3: Keyword-Rich (helpful for SEO)**

* **Description:** 密碼忘記了？ 快速重置密碼、找回密碼、安全性提升。 學習如何管理你的網站帳戶密碼，確保安全可靠。
* **Translation:** Forgot your password? Quick password reset, password recovery, and security enhancement. Learn how to manage your website account password and keep it secure and reliable.

**Option 4: Focusing on the User’s Experience (more user-centric)**

* **Description:** 無法登入？ 找回密碼的簡易步驟、常見問題解答及密碼恢復教學，幫助你重新進入網站。
* **Translation:** Can’t log in? Easy steps to recover your password, FAQs, and password recovery tutorials to help you get back onto the website.

**Key considerations when choosing:**

* **Length:** The best description length depends on your theme and how it displays tags. Shorter is generally better, especially if space is limited.
* **Keywords:** Consider the keywords people might search for when they’ve forgotten their password (e.g., “重置密碼,” “找回密碼,” “密碼恢復”).
* **User-friendliness:** Aim for clear and easy-to-understand language.

For practical usage inside WordPress, I recommend selecting one of these descriptions and entering it in the “Description” field for the “密碼忘記” tag. You can find the space for setting the description when you edit or create the tag in the WordPress post tag management.