Here are a few options for a WordPress post_tag description for “哪家信用卡好” in Traditional Chinese, each with a slightly different focus:

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

> 想找到最適合你的信用卡嗎？這裡分享信用卡比較、推薦和優惠資訊，幫助你做出明智的選擇。

* **Translation:** Want to find the best credit card for you? This shares credit card comparisons, recommendations, and promotional information, helping you make an informed decision.
* **Why it works:** Direct and emphasizes the purpose of the tag.

**Option 2 (Benefit-Oriented):**

> 比較各家信用卡，找出能讓你省錢、享優惠、累積哩程或提升生活品質的那個。 提供實用的信用卡資訊，讓你聰明消費，聰明理財。

* **Translation:** Compare various credit cards and find the one that can save you money, enjoy benefits, accumulate mileage, or improve your quality of life. Provides practical credit card information, allowing you to spend and manage your finances wisely.
* **Why it works:** Highlights the benefits of finding the right card.

**Option 3 (More Specific & Keyword-Rich):**

> 信用卡比較、推薦、申請、優惠、回饋、紅利、哩程、現金回饋… 這裡有關於各種信用卡的資訊，包含不同銀行、不同卡別的比較分析，幫助你選擇最划算的信用卡。

* **Translation:** Credit card comparison, recommendation, application, promotions, rewards, bonus points, mileage, cashback… Here is information about various credit cards, including comparisons and analysis of different banks and different card types, helping you choose the most cost-effective credit card.
* **Why it works:** Uses relevant keywords that people will search for.

**Option 4 (Focus on Avoiding Bad Choices):**

> 避免掉入信用卡陷阱！透過我們的資訊，了解不同信用卡的優缺點，找到最適合你的，避開高利率、高年費，聰明消費，安心理財。

* **Translation:** Avoid falling into credit card traps! Through our information, understand the pros and cons of different credit cards, find the one that’s right for you, avoid high interest rates and annual fees, and spend and manage your finances wisely.
* **Why it works:** Emphasizes risk avoidance, which can appeal to some users.

**How to choose the best option:**

* **Consider your target audience:** Who are you writing for?
* **Consider the content of your posts:** Do your posts focus more on comparisons, benefits, or warnings?
* **Consider SEO:** Use the keyword “信用卡” and variations where relevant.

When entering this description in WordPress, go to the tag’s editing screen (usually under “Posts” -> “Tags”). Look for a field labeled “Description” or something similar. Choose the option that best suits your needs and paste it there. This description will help improve SEO and provide context to your readers when they are browsing or searching for content under this tag.