Here are a few options for a WordPress post tag description, catering to different focus points:

**Option 1: Short & Sweet (Focus on the purpose of the tag)**

> **Description:** 了解最新的資費資訊，包括手機、寬頻、電訊服務等的價格、方案和優惠。 (Get the latest pricing information, including prices, plans, and offers for mobile phones, broadband, and telecommunications services, etc.)

**Option 2: Slightly More Detailed (Focus on content covered)**

> **Description:** 這個標籤涵蓋所有關於資費的主題，包括不同電訊商的套餐比較、最新費用的公告、以及如何節省資費的策略和建議。 (This tag covers all topics related to pricing, including comparisons of packages from different telecommunication providers, announcements of the latest fees, and strategies & suggestions on how to save on costs.)

**Option 3: Search Engine Optimized (SEO-focused, might be slightly redundant)**

> **Description:** 查詢最新的資費、電訊資費、手機資費、寬頻資費等資訊。 我們提供最新的資費更新、優惠方案，幫助您找到最划算的電訊服務。 (Find the latest information on pricing, telecommunications fees, mobile phone fees, broadband fees, etc. We provide the latest price updates and promotional plans to help you find the most cost-effective telecommunications service.)

**Option 4: Focus on the reader’s benefit (Action-oriented)**

> **Description:** 想要節省電訊費用？ 這個標籤為您整理了最新的資費資訊，助您了解不同電訊商的方案，並找到最適合您需求的省錢方案。 (Want to save on telecommunications costs? This tag provides you with the latest pricing information, helping you understand the plans of different telecommunication providers and find the most money-saving option that suits your needs.)

**Key Considerations when choosing:**

* **Target Audience:** Who are you writing for? Are they tech-savvy or more general users?
* **Blog Content:** Is the blog mostly focused on comparisons, news, or practical advice?
* **SEO goals:** Are you trying to rank for certain search terms?
* **Brevity:** WordPress recommends concise descriptions. However, more detail can be beneficial, especially if the tag title is ambiguous.

**How to Implement in WordPress:**

1. **Access the Tag:** Go to your WordPress dashboard and navigate to “Posts” > “Tags”.
2. **Find the Tag:** Locate the tag “資費”.
3. **Edit the Tag:** Click on the tag or the “Edit” link.
4. **Add the Description:** In the tag settings, there’s usually a field labeled “Description”. Paste your chosen description into this field.
5. **Update:** Save the changes.

Remember to tailor the description to best suit your specific content and audience. Good luck!