Here are a few options for a WordPress post_tag description in Traditional Chinese for the title “刷卡優惠”, ranging in formality and length:

**Option 1 (Concise and General):**

> 探索各種刷卡折扣、紅利回饋、現金回饋等信用卡優惠資訊！

* **Translation:** Explore various credit card discounts, bonus cashback, and cash back offers!
* **Suitable for:** A broad overview, good for general use.

**Option 2 (Slightly more Specific):**

> 精選信用卡刷卡優惠，包括酒店、餐飲、購物、旅遊等不同類型的折扣活動，讓你刷得開心，省得越多！

* **Translation:** Featured credit card swipe discounts, including discounts for hotels, dining, shopping, tourism, and other different types of activities, letting you swipe happily and save more!
* **Suitable for:** If you have a specific focus on different spending categories.

**Option 3 (Focus on Variety):**

> 信用卡優惠大集合！ 提供刷卡折扣、紅利點數、現金回饋、分期付款等多元優惠選擇，滿足你的不同消費需求。

* **Translation:** A collection of credit card offers! Providing credit card discounts, bonus points, cash back, installment payments, and other diverse offer options to meet your different spending needs.
* **Suitable for:** Emphasizing the range and variety of offers.

**Option 4 (Simple and Direct):**

> 這裡提供最新的刷卡優惠資訊。

* **Translation:** Here are the latest information on credit card swipe offers.
* **Suitable for:** When you just want a quick and simple description for your viewers.

**Which option to choose depends on the overall tone and focus of your website.** You can adjust these further to fit your specific content. Consider:

* **Target audience:** Who are you trying to reach?
* **Content focus:** Is your site more about a specific type of offer?
* **SEO (search engine optimization):** Consider including relevant keywords related to credit cards and spending categories.