Okay, here are a few options for a WordPress post tag description for “誠品線上” (Eslite Online) in Traditional Chinese, ranging from simple to slightly more descriptive:

**Option 1: Simple & Concise**

* **Description:** 誠品線上 (Eslite Online) 相關文章與資訊。 (Articles and information related to Eslite Online.)

**Option 2: More Descriptive**

* **Description:** 探索誠品線上，深入了解誠品書店的數位世界。包含書籍、文具、生活用品等線上購物，以及關於誠品線上平台的最新消息與活動。 (Explore Eslite Online, and delve into the digital world of Eslite Bookstore. Includes online shopping for books, stationery, lifestyle products, as well as the latest news and events related to the Eslite Online platform.)

**Option 3: Focused on Specific Content**

* **Description:** 關於誠品線上最新書籍推薦、獨家商品、促銷活動，以及使用教學與心得分享。 (About the latest book recommendations, exclusive products, promotional activities, and user guides and experience-sharing from Eslite Online.)

**Option 4: Short and Informative**

* **Description:** 誠品線上：掌握最新誠品購書與文創資訊。 (Eslite Online: Stay up-to-date with the latest book and cultural and creative product information from Eslite.)

**Recommendation:**

I’d generally recommend **Option 2 or 4**. They give a good overview of what the tag encompasses without being overly verbose. The best option depends on the specific content you’re tagging and what information you want to highlight.

**How to Use This in WordPress:**

1. **Go to your WordPress Dashboard.**
2. **Navigate to Posts > Tags (or Categories if you used a category for this).**
3. **Find the tag/category “誠品線上” (Eslite Online).**
4. **Under the tag/category, there should be a field labelled “Description”.**
5. **Paste your preferred description above into that field.**
6. **Click “Update Tag/Category” to save.**

Remember to consider what kind of content you are tagging with this, and tailor your description to highlight the relevant aspects for your audience. Good luck!