Here are a few options for describing a WordPress post tag titled “公共交通” (Gōnggòng jiāotōng – Public Transport) in Traditional Chinese, ranging in formality and length:

**Option 1: Short & Sweet (Good for general use)**

* **描述 (Miáoshù – Description):** 指涉及公共交通的內容，包括巴士、地鐵、火車等。 (Zhǐ shèjí gōnggòng jiāotōng de nèiróng, bāokuò bāshì, dìtiě, huǒchē děng.) – *This tag covers content related to public transportation, including buses, subways, trains, etc.*

**Option 2: Slightly More Detailed (Good for clarity)**

* **描述 (Miáoshù – Description):** 分享有關公共交通工具如巴士、地鐵、火車、輪船、纜車等，以及相關資訊，如路線、票務、指南。 (Fēnxiǎng yǒuguān gōnggòng jiāotōng gōngjù rú bāshì, dìtiě, huǒchē, lúnchuán, lǎnchē děng, yǐjí xiāngguān zīxùn, rú lùxiàn, piàowù, zhǐnán.) – *Sharing information related to public transportation such as buses, subways, trains, ferries, cable cars, etc., as well as related information such as routes, ticketing, and guides.*

**Option 3: Focus on Modern Context (If your content often deals with apps, etc.)**

* **描述 (Miáoshù – Description):** 涵蓋城市與城際公共交通，包括巴士、地鐵、火車、共享單車、打車App等相關內容與討論。 (Hángài chéngshì yǔ chéngjì gōnggòng jiāotōng, bāokuò bāshì, dìtiě, huǒchē, gòngxiǎng dānchē, dǎchē App děng xiāngguān nèiróng yǔ tǎolùn.) – *Covering urban and intercity public transportation, including buses, subways, trains, shared bicycles, ride-hailing apps, and related content and discussions.*

**Option 4: Simple and broad**

* **描述 (Miáoshù – Description):** 關於公共交通的所有資訊。 (Guānyú gōnggòng jiāotōng de suǒyǒu zīxùn.) – *All information about public transport.*

**Tips for Choosing the Best Description:**

* **Target Audience:** Consider who is reading your blog.
* **Content Scope:** Does your blog cover a wide array of public transport topics, or is it more focused?
* **Brevity vs. Clarity:** Choose a description that is clear yet concise.
* **Keywords:** The descriptions above naturally already include keywords that are helpful for SEO, such as 巴士 (bāshì – bus), 地鐵 (dìtiě – subway), 火車 (huǒchē – train).

**How to add the description in WordPress:**

1. **Go to the “Tags” section:** In your WordPress admin dashboard, go to *Posts -> Tags*.
2. **Edit the “公共交通” tag:** Find the “公共交通” tag in the list and click “Edit”.
3. **Add the Description:** You’ll find a field typically called “Description (描述)” or similar. Paste your chosen description into this field. If you don’t see this field, make sure the “Screen Options” in the top right (usually) of the admin page are enabled to show the description field for tags..
4. **Update the Tag:** Click the “Update” button to save your changes.

Choose the option that best suits your needs and your blog’s style. Good luck!