Here are a few options for a WordPress post tag description in Traditional Chinese for the title “online payment”, with varying levels of detail and nuance:

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

* **Description:** 網上付款相關資訊。 (Wǎngshàng fùkuǎn xiāngguān zīxùn.)
* **Translation:** Information related to online payment.
* **Why it works:** Clear, concise, and covers the basic intent.

**Option 2 (Slightly More Descriptive):**

* **Description:** 討論網上交易、電子支付、及支付方式的各種資訊和攻略。 (Tǎolùn wǎngshàng jiāoyì, diànzǐ zhīfù, jí zhīfù fāngshì de gèzhǒng zīxùn hé gōnglüè.)
* **Translation:** Discusses various information and guides on online transactions, electronic payments, and payment methods.
* **Why it works:** Provides a broader scope, making it attractive for posts about different aspects of online payment.

**Option 3 (Highlighting Security/Reliability):**

* **Description:** 關於安全可靠的網上付款方式、付款流程和相關資訊。 (Guānyú ānquán kěkào de wǎngshàng fùkuǎn fāngshì, fùkuǎn liúchéng hé xiāngguān zīxùn.)
* **Translation:** Information about secure and reliable online payment methods, payment processes, and related information.
* **Why it works:** Appeals to users concerned about the safety of online transactions.

**Option 4 (For a more general audience/topic):**

* **Description:** 涵蓋網上付款、電子支付、及相關應用和趨勢。 (Hángài wǎngshàng fùkuǎn, diànzǐ zhīfù, jí xiāngguān yìngyòng hé qūshì.)
* **Translation:** Covering online payments, electronic payments, and related applications and trends.
* **Why it works:** Provides a broader view of the scope of the topic

**Key Considerations for Choosing the Best Option:**

* **The overall theme of your website/blog:** Is your content focused on practical guides, security, general information etc.?
* **Your target audience:** Consider what sort of information they’re most likely to be looking for.
* **The types of posts you’ll be tagging:** Does the description accurately reflect the range of topics you will be covering?

Ultimately, the best description depends on your specific needs, but all of the above options are acceptable and informative. When you create the tag in WordPress, you can simply copy and paste your chosen description into the tag creation field.