Here are a few options for a WordPress post_tag description for “比價” (Bi Jia – Comparison Shopping) in Traditional Chinese, ranging from simple to more descriptive:

**Option 1 (Short & Sweet):**

* **Description:** 比較商品價格，找到最划算的交易。 (Compare product prices, find the best deals.)

**Option 2 (Slightly More Detailed):**

* **Description:** 尋找不同店家的相同商品價格，了解價格差異，聰明購物。 (Search for prices of the same products from different vendors, understand price differences, and shop smart.)

**Option 3 (Focusing on Value):**

* **Description:** 輕鬆比較價格，掌握市場行情。省錢秘訣，物超所值，聰明消費必備。 (Easily compare prices, grasp market trends. Essential for saving money, getting value for money, and smart shopping.)

**Option 4 (Including Search and Information):**

* **Description:** 收集各大平台商品價格，方便你快速比價，尋找最划算的選擇。提供價格資訊、折扣優惠，讓你輕鬆做出購物決策。 (Collecting product prices from major platforms, making it easy to compare prices and find the best deals. Provides price information, discounts, and offers, helping you make shopping decisions easily.)

**Option 5 (Targeting Tech-Savvy Shoppers):**
* **Description:** 告別手動比價！快速比價、智能分析，一站式掌握商品價格，助你精明購物，買得更划算！利用比價網站、App 和工具，輕鬆比較商品價格，找出最優惠的方案。 (Say goodbye to manual price comparisons! Quick price comparison, intelligent analysis, one-stop grasp of product prices, helping you shop smartly and get better deals! Use price comparison websites, Apps and tools to easily compare product prices and find the most favorable option.)

**Which one to choose depends on your specific needs:**

* **If you have limited space,** Option 1 is great.
* **If you want to be generally informative,** Option 2 or 3 are useful.
* **If you have the space and want to emphasize functionality and tools,** Option 4 or 5 are suited.

Remember to put this description in the “Description” field when you create or edit the post tag in your WordPress admin panel. You can also modify them further to better fit the exact focus of your website. Good luck!