Here are a few options for a WordPress post_tag description for “法定貨幣” (Legal Tender) in Traditional Chinese, along with considerations for each:

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

* **Description:** 指由政府發行及宣告，在特定領土內被普遍接受作為支付貨幣的單位。

* **Explanation:** This is a very straightforward and accurate definition of legal tender. It is readily understood by most people.

**Option 2 (Adding Focus on Value):**

* **Description:** 指得到政府背書，被法律認可，並且具有強制流通效力的貨幣，代表著一定的價值和購買力。

* **Explanation:** Adds emphasis on the value and purchasing power that legal tender represents, which might be useful for those interested in economics or financial literacy.

**Option 3 (Linking to Digital Currencies):**

* **Description:** 由政府發行的貨幣，被法律規定為支付手段。與虛擬貨幣相對，法定貨幣由中央銀行控制，並受到政府機構的監管。

* **Explanation:** Suitable if the blog frequently discusses digital currencies or this tag is used to differentiate legal tender from alternatives. Offers a useful comparison.

**Option 4 (More approachable, for a general audience):**

* **Description:** 由國家或地區政府發行的官方貨幣。例如：港幣、美元等。 它們是我們日常生活中用來買賣商品和服務的「金錢」。

* **Explanation:** Uses more common language and examples to clarify legal tender’s function in daily life, which is useful if the posts are aimed at a less informed audience.

**Choosing the best option:**

Consider these factors:

* **Target Audience:** Who are you writing for? A general audience? Economics students?
* **Blog’s Content:** How does the blog use other tags? What is the overall tone?
* **Purpose of the Tag:** Will the tag be used mainly for economic insights? Or to classify posts about general financial news?

**How to Use It in WordPress:**

1. Go to your WordPress admin panel.
2. Go to **Posts > Tags**.
3. Either create a new tag or edit an existing one (if you already created this one).
4. Fill in the **Name** field with “法定貨幣”.
5. In the **Description** field, paste the text from your chosen option.
6. Click **Update** or **Add New Tag**.

Remember to tailor the description to best reflect the content of your blog and your target audience. Good luck!