Okay, here’s a description for the WordPress post tag “交易手續費” (Jiāo Yì Shǒu Xù Fèi) in Traditional Chinese, suitable for use as a post tag:

**Description Options:**

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

> 瞭解您的交易成本。此標籤涵蓋與各種交易相關的手續費，包括股票、加密貨幣或其他金融交易。

* **Translation:** Understand your transaction costs. This tag covers fees related to various transactions, including stocks, cryptocurrencies, or other financial transactions.

**Option 2 (More Explanatory):**

> 探索不同交易平台上的手續費結構。我們將討論各種交易類型可能涉及的費用，例如佣金、點差、提款費等。從而幫助您做出更明智的投資決策，並管理您的交易成本。

* **Translation:** Explore the fee structures of different trading platforms. We will discuss the fees that may be involved in various types of transactions, such as commissions, spreads, withdrawal fees, etc. This helps you make more informed investment decisions and manage your transaction costs.

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

> 尋找關於交易手續費的實用資訊。本標籤內的文章提供如何計算和比較不同交易平台手續費的小貼士，以及降低交易成本的策略。
* **Translation:** Find practical information about transaction fees. The articles within this tag provide tips on how to calculate and compare fees between different trading platforms, as well as strategies to reduce transaction costs.

**Option 4 (Benefit-Oriented):**

> 減少交易成本，增加您的利潤。此標籤提供交易手續費的深入分析，帮助您了解费用是如何运作的，并寻找节省资金的方法。
* **Translation:** Reduce transaction costs and increase your profits. This tag provides an in-depth analysis of trading fees, helping you understand how fees work and find ways to save money.

**How to Use in WordPress:**

1. **Go to your WordPress admin panel.**
2. **Navigate to “Posts” > “Tags”.** (or “文章” if your dashboard is in Chinese)
3. **Add a new tag.** In the “Name” field, enter “交易手續費” (Jiāo Yì Shǒu Xù Fèi).
4. **In the “Description” field, choose one of the options above (or adapt one to perfectly suit your content) and paste it in.** Make sure the description is clear, concise, and relevant to the content you’ll be tagging.
5. **Click “Add New Tag.”**
6. **When writing a post, in the Tag section, start typing “交易手續費” and select the tag when it appears.**

**Key Considerations for Choosing a Description:**

* **Audience:** Who are you writing for? (Beginners, experienced traders?) Tailor the language to their level of understanding.
* **Content:** What type of content will you be tagging? (e.g., news, tutorials, comparisons?) The description should align with the content.
* **Purpose:** What do you want readers to get from using the tag? (e.g., information, strategies, tips?) Highlight the key benefits.
* **SEO:** Make sure the description includes relevant keywords (like “交易手續費”, “手續費”, “佣金”, “交易”, “交易成本”, or related terms) to help with search engine optimization if applicable.

I recommend choosing the description that best reflects the focus of your trading-related content. Good luck!