Here are a few options for describing the WordPress post tag “憑單 (Píngdān)” in Traditional Chinese, along with explanations to help you choose the best fit for your specific content:

**Option 1 (Most Common and General):**

* **Description:** 票據、收據、賬單等類似憑證。用於記錄交易、付款或服務的證明文件。
* **Translation:** Receipts, bills, and other similar vouchers. Used to record transactions, payments, or service proofs.
* **Why this works:** It’s broad enough to cover many types of “憑單” and its variations, and it explains the basic function.

**Option 2 (Focus on Business/Transactions):**

* **Description:** 用於商業交易或財務記錄的憑證，包括發票、收據、訂單等，是重要的會計憑證。
* **Translation:** Vouchers used for business transactions or financial records, including invoices, receipts, orders, etc., which are important accounting documents.
* **Why this works:** It specifically mentions business context and relates the tag to accounting practices.

**Option 3 (If the content involves payment information):**

* **Description:** 支付或收款的證明文件。包含支付證明、收據、轉賬證明等，用於核實交易的憑證。
* **Translation:** Proof documents for payment or receipt of money. Includes payment proofs, receipts, and transfer confirmations, used to verify transactions.
* **Why this works:** It emphasizes the monetary aspect of “憑單” and the purpose of verification.

**Option 4 (Simple and Concise):**

* **Description:** 證明交易或記錄付款的文件。
* **Translation:** Documents that prove transactions or record payments.
* **Why this works:** Short, sweet, and easily understood.

**How to choose the best option:**

* **Consider your content:** What is the primary subject matter of the posts you’re tagging? Is it general business advice, personal budgeting, retail experiences, etc.? Choose the description that best aligns with the typical subject matter.
* **Think about your audience:** What is their level of knowledge? For a knowledgeable audience, a more technical description may be appropriate. For a broader audience, a simpler explanation might be better.
* **Be consistent:** Once you’ve selected a description, use it consistently throughout your site.

**Important Considerations for WordPress:**

* **Character Limit:** WordPress post tag descriptions may have a character limit, so be mindful of length. The options provided are generally concise, but you may need to adjust them to fit within the limit.
* **SEO:** WordPress post tag descriptions don’t have a massive impact on SEO, but including relevant keywords like “收據” (receipt), “發票” (invoice), etc., in your description can help. Choose an option that naturally includes the right terms for that context.

No matter which option you pick, aim for clarity and accuracy. Each of the above options would work well. Good luck!