Here are a few options for a WordPress post tag description for “手機支付” (Mobile Payment) in Traditional Chinese, catering to different styles and purposes:

**Option 1: Concise and Informative**

* **Description:** 方便快速的數位金流方式，透過手機即可完成付款，享受更便利的消費體驗。 (Convenient and fast digital payment methods, completed via mobile phone, enjoy a more convenient shopping experience.)

**Option 2: Focus on Advantages**

* **Description:** 告別現金，擁抱科技！了解手機支付的優勢，包括安全性、便利性，以及在各種場景下的應用，例如線上購物、實體店面等。 (Bid farewell to cash, embrace technology! Understand the advantages of mobile payment, including security, convenience, and its application in various scenarios, such as online shopping, physical stores, etc.)

**Option 3: Geared towards a specific audience (retailers)**

* **Description:** 為您的商家導入手機支付，提升顧客體驗，增加交易機會，並跟上現代支付趨勢。 (Implement mobile payment for your business, enhance customer experience, increase transaction opportunities, and keep up with modern payment trends.)

**Option 4: Simple & Broad**

* **Description:** 關於手機支付的所有資訊，包括功能、應用程式和趨勢。 (All information about mobile payment, including features, applications and trends.)

**Key Things to Consider When Choosing a Description:**

* **Target Audience:** Who are you writing for? Shoppers? Business owners?
* **Post Content:** Does the description accurately reflect the topics covered in posts tagged with “手機支付?”
* **Keywords:** Does the description include relevant keywords to help with search engine optimization (SEO)? Consider adding Chinese keywords like “行動支付” (action payment) and relevant app names if you have a site/niche on them
* **Length:** Keep it concise and easy to understand. WordPress allows a limited character count in some themes.

**How to Use in WordPress:**

1. **Log in to your WordPress dashboard.**
2. **Go to “Posts” -> “Tags”.**
3. **Find the “手機支付” tag and click “Edit”.**
4. **In the “Description” field, paste your chosen description.**
5. **Click “Update”.**

I recommend experimenting with a few options to see which one best fits your website and content. Good luck!