Here are a few options for a WordPress post tag description, depending on the nuance you want to convey, with the title set to “cost” in Traditional Chinese (費用) in Chinese:

**Option 1: General & Concise**

* **Title:** 費用 (Fèiyòng)
* **Description:** 關於商品、服務或其他活動的價格。 (Guānyú shāngpǐn, fúwù huò qítā huódòng de jiàgé. – Concerning the prices of goods, services, or other activities.)

This is a straightforward and broadly applicable definition.

**Option 2: Emphasis on Money & Expenses**

* **Title:** 費用 (Fèiyòng)
* **Description:** 此標籤包含與金錢支出、成本和開銷相關的文章。 (Cǐ biāoqiān bāohán yǔ jīnqián zhīchū, chéngběn hé kāixiāo xiāngguān de wénzhāng. – This tag includes posts related to money spent, costs, and expenses.)

Emphasizes the financial aspect of the cost.

**Option 3: For E-commerce or Financial Content**

* **Title:** 費用 (Fèiyòng)
* **Description:** 探討商品和服務的價格，包括定價策略、預算規劃、財務分析等。 (Tàotǎo shāngpǐn hé fúwù de jiàgé, bāokuò dìngjià cèlüè, yùsuàn guīhuà, cáiwù fēnxī děng. – Exploring the prices of goods and services, including pricing strategies, budget planning, financial analysis, etc.)

More specific to topics revolving around pricing and financial management.

**Option 4: For a More Informal/Everyday Sense**

* **Title:** 費用 (Fèiyòng)
* **Description:** 關於花費的，或是你需要支付的東西的。 (Guānyú huāfèi de, huòshì nǐ xūyào zhīfù de dōngxī de. – About spending, or things you need to pay for.)

This is slightly less formal, and appropriate if your content leans towards conversational.

**How to choose the best option:**

* **Consider your target audience:** Who are you writing for? Professionals? General readers?
* **Analyze your content:** What kind of posts will you be tagging?
* **Focus on clarity:** Choose the description that best explains the meaning of “費用” within the context of your site.

Remember to enter the Traditional Chinese title and the description in the WordPress post tag settings. You can typically find this under “Posts” -> “Tags” in your WordPress admin. Good luck!