Here are a few options for the WordPress post tag description, along with explanations:

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

> 加幣兌換台幣相關資訊，包括匯率、換匯地點、費用等。

* **Translation:** Information related to Canadian Dollar exchange to New Taiwan Dollar, including exchange rates, exchange locations, fees, etc.
* **Why it’s good:** Directly addresses the topic, uses key keywords, and promises useful information.

**Option 2 (Slightly Broader):**

> 查詢加幣兌換台幣資訊，掌握匯率變化，了解最佳換匯方式，輕鬆換匯。

* **Translation:** Find information about Canadian Dollar exchange to New Taiwan Dollar, stay informed about exchange rate changes, understand the best exchange methods, and exchange easily.
* **Why it’s good:** Appeals to the user’s need for helpful information (staying informed, easy exchange) and includes a call to action (find information).

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

> 加幣換台幣，實用的匯率查詢、換匯秘訣和常見問題解答，助您做出明智的換匯決策。

* **Translation:** Canadian Dollar to New Taiwan Dollar exchange, practical exchange rate inquiries, exchange tips, and frequently asked questions answered to help you make informed exchange decisions.
* **Why it’s good:** Focuses on the benefits of reading the posts (practicality, informed decisions).

**Option 4 (Keyword-Rich):**

> 加幣, 加幣兌換, 台幣, 匯率, 換匯, 換匯地點, 加幣換台幣, 匯率查詢, 換匯教學, 加幣換台幣教學.

* **Translation (Essentially):** Canadian Dollar, Canadian Dollar exchange, New Taiwan Dollar, exchange rate, currency exchange, exchange locations, exchanging Canadian Dollar to New Taiwan Dollar, exchange rate inquiry, currency exchange tutorial, Canadian Dollar to New Taiwan Dollar tutorial.
* **Why it’s good:** Optimized for search engines. Contains a lot of relevant keywords, making it more likely that your content will be discovered by users searching for these terms. (Note: This is a tag *description*, thus we want longer words).

**How to choose:**

* **SEO:** If SEO is a priority, Option 4 is the strongest because of its keyword density.
* **User Experience:** Options 1, 2, and 3 are more user-friendly, explaining the purpose of the tag in a concise, understandable way.
* **Content:** Consider what kind of content you’ll be associating with this tag. If it’s a guide, Option 3 might be a good fit. If it’s news updates, Option 1 or 2.

When entering the description in WordPress, find the “Description” field for the tag (usually found in the tag editing screen). I suggest the concise and direct option or the keyword-rich option for SEO.