Here are a few options for a WordPress post_tag description for “美國運通” (American Express) in Traditional Chinese, varying in tone and detail:

**Option 1: Concise & Clear**

* **Description:** 美國運通信用卡及相關資訊，包括優惠、禮遇、申請資格等。 （American Express credit cards and related information, including benefits, rewards, application requirements, etc.）

**Option 2: Slightly More Descriptive**

* **Description:** 探索美國運通信用卡的世界。了解其尊貴的會員福利、旅遊優惠及消費回饋，助您享受更優質的生活體驗。（Explore the world of American Express credit cards. Learn about their premium membership benefits, travel discounts, and consumer rewards to help you enjoy a better life experience.）

**Option 3: Focusing on a Specific Audience**

* **Description (for travel-focused audience):** 美國運通旅遊優惠：享受酒店住宿、機票升級及各種旅遊禮遇，讓您的旅途更添精彩。（American Express travel perks: Enjoy hotel stays, flight upgrades, and various travel benefits, making your journey even more wonderful.）

**Option 4: Short & Sweet**

* **Description:** 美國運通卡相關資訊，一覽無遺。（Information related to American Express cards, all in a glance.）

**Key Considerations When Choosing:**

* **Target Audience:** Who is reading your blog? Adjust the language to suit their knowledge level and interests.
* **Content Focus:** What kind of information will you be writing about regarding American Express?
* **SEO:** Include keywords relevant to what you will be discussing, such as “信用卡” (credit card), “優惠” (promotions), “禮遇” (benefits), “旅遊” (travel), etc.

Choose the one that best fits your overall website context and how you want to present content related to American Express. Remember to also consider adding useful keywords into the tag’s slug (the URL-friendly version) for better SEO. Good luck!