Here’s a description suitable for a WordPress post tag titled “買東西” in Traditional Chinese, keeping in mind it’s a tag and should be concise and descriptive:

**Description:**

所有與購物、採買、購買商品相關的內容。包括購物攻略、商品推薦、折扣資訊、購物體驗分享等。 (All content related to shopping, purchasing, and buying items. Includes shopping guides, product recommendations, discount information, and shopping experience sharing, etc.)

**Why this works:**

* **Concise & Relevant:** Accurately describes the general topic of “Buying Things.”
* **Inclusive:** Covers a broad range of shopping-related activities.
* **Clear & Understandable:** Uses straightforward Traditional Chinese.
* **Keywords:** Uses terms like “購物 (shopping)”, “採買 (purchasing)”, “商品 (products)”, “折扣 (discounts)”, and “購物體驗 (shopping experience)” which are relevant and will aid in SEO on your WordPress site.
* **Action-Oriented (Implicitly):** Hints at the value your content offers to someone interested in shopping (“guides,” “recommendations,” etc.).

This description will help users understand what kind of content they can expect to find when they click on this tag. You can also tailor it further based on your specific blog’s focus (e.g., if it’s solely about online shopping, you can add “線上購物” or “網路購物”).