Here are a few options for the WordPress `post_tag` description, ranging in detail and tone. Choose the one that best fits your website’s style and overall content:

**Option 1: Concise & Practical**

* **Description:** 標示所有關於旅行開銷的文章。包含機票、住宿、交通、餐饮等費用資訊，幫助您規劃預算。 (Marks all articles about travel expenses. Includes information on flight tickets, accommodation, transportation, dining and other costs to help you plan your budget.)

**Option 2: Slightly More Detailed**

* **Description:** 用於標記與旅行費用、預算、開支相關的文章。涵蓋不同地點、不同旅行方式的費用比較與建議，讓您更精明地安排您的旅程。(Used to tag articles related to travel expenses, budgets, and spending. Coverages cost comparisons and recommendations for different destinations and travel styles, allowing you to plan your journey more wisely.)

**Option 3: Focus on User Benefit**

* **Description:** 需要規劃旅行預算嗎？此處的文章提供各種旅行開銷的詳盡分析，從機票到紀念品應有盡有，讓您對您的旅程費用一目了然，輕鬆掌握預算！ (Need to plan your travel budget? The articles here provide in-depth analysis of various travel expenses, from airfare to souvenirs. Get a clear understanding of your travel costs and easily manage your budget!)

**Option 4: Short & Sweet**

* **Description:** 旅行費用相關文章索引。(Index of articles related to travel expenses.)

**How to implement this in WordPress:**

1. **Go to the “Tags” section:** In your WordPress admin dashboard, go to **Posts > Tags**.
2. **Find the “旅遊費用” tag:** Either find it in the existing list, or create a new tag named “旅遊費用” if it doesn’t exist.
3. **Edit the tag:** Click the “Edit” or “Quick Edit” link for the “旅遊費用” tag.
4. **Enter the Description:** There’s usually a description field. Paste your chosen description into that field.
5. **Update:** Save the changes.

**Important Considerations:**

* **Consistency:** Choose one description style and stick with it for your other tags for uniformity.
* **Keywords:** Consider how people might search for this information. Use relevant keywords in the description to help with SEO (e.g., 預算, 機票, 住宿).
* **Readability:** Make sure the description is easy to read and understand.
* **Website Context:** Tailor the description to your overall blog’s voice and target audience.