Here are a few options for the description of the WordPress post tag “悠遊卡” (EasyCard) in Traditional Chinese, varying in length and focus:

**Option 1 (Short & Sweet):**

> 方便快捷的交通支付工具，適用於台北捷運、公車、停車場等。

**Translation:** Convenient and quick transportation payment tool, applicable for Taipei MRT, buses, parking lots, etc.

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

> 悠遊卡，台灣最普遍的電子票證，可用於搭乘大眾運輸、在便利商店、超市、停車場、書店等處進行消費。 瞭解更多關於儲值、使用範圍，以及其他相關資訊。

**Translation:** EasyCard, Taiwan’s most common electronic ticketing system, can be used to ride public transportation and make purchases at convenience stores, supermarkets, parking lots, bookstores, etc. Learn more about top-ups, usage范围, and other related information.

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

> 擁有悠遊卡，讓您輕鬆出行！ 免去排隊購票的煩惱，更省時省力。 快速感應支付，享受便捷的城市生活。

**Translation:** Get an EasyCard and make your travel easy! Avoid the hassle of queuing to buy tickets and save time and effort. Quick contactless payment, enjoy the convenience of city life.

**Option 4 (Emphasizing Compatibility and Features):**

> 涵蓋悠遊卡相關資訊，包括功能、使用範圍、儲值方式、票種選擇等等。 了解悠遊卡如何讓您的生活更便捷，以及如何善用它來享受更多優惠。

**Translation:** Covering EasyCard-related information, including features, usage areas, top-up methods, ticket type selection, and so on. Learn how EasyCard can make your life more convenient, and how to leverage it to enjoy more discounts.

**Choosing the best option depends on your blog’s content and target audience:**

* If you’re writing a general information blog, Option 2 or 4 might be best.
* If you’re emphasizing convenience, Option 3 is good.
* If you need a quick description for your tags area, Option 1 works well.

Remember to consider your overall blog’s tone and style when making your choice. Good luck!