Here are a few descriptions for a WordPress post tag with the title “全國” (Quánguó – Whole Country/Nationwide) in Traditional Chinese, catering to different needs and audiences:

**Option 1: Concise & General**

> 指的是涵蓋整個國家範圍的事物，包括政策、新聞、活動等。 (zhǐ de shì hánggài zhěnggè guójiā fànwéi de shìwù, bāokuò zhèngcè, xīnwén, huódòng děng.)
>
> *(Meaning: Refers to anything encompassing the entire country, including policies, news, events, etc.)*

**Option 2: More Informative & Descriptive**

> 代表涵蓋中華人民共和國境內所有地區的資訊。 這標籤常用于标示與中華人民共和國全國範圍內相關的新聞、政策、活動、數據， 或任何涉及整個國家的重要議題。 (dài biǎo hánggài zhōng huá rén mín gòng hé guó jìng nèi suǒyǒu dìqū de zīxùn. zhè biāoqiān cháng yòng yú biāoshì yǔ zhōng huá rén mín gòng hé guó quán guó fànwéi nèi xiāngguān de xīnwén, zhèngcè, huódòng, shùjù, huò rènhé shèjí zhěnggè guójiā de zhòngyào yītí.)
>
> *(Meaning: Represents information that covers all areas within the People’s Republic of China. This tag is often used to mark news, policies, events, data, or any important issues related to the entire country.)*

**Option 3: Focus on Relevance to the Website**

> 本網站關於全國範圍內事件、政策和資訊的標示。 涵蓋與整個國家相關的重要議題，以期提供全面的資訊參考。 (běn wǎngzhàn guānyú quán guó fànwéi nèi shìjiàn, zhèngcè hé zīxùn de biāoshì. hánggài yǔ zhěnggè guójiā xiāngguān de zhòngyào yītí, yǐ qī tígōng quánmiàn de zīxùn cānkǎo.)
>
> *(Meaning: A tag for nationwide events, policies and information on this website. Covers important issues related to the whole country, aiming to provide a comprehensive information reference.)*

**Option 4: Simple Explanation for Users**

> 全國 – 表示涵蓋整個國家範圍的內容。 (quánguó – biǎoshì hánggài zhěnggè guójiā fànwéi de nèiróng.)
>
> *(Meaning: Nationwide – indicates content that covers the entire country.)*

**Key Considerations When Choosing:**

* **Your Audience:** Who are you writing for? Are they beginners, seasoned readers, or specific experts?
* **Website’s Focus:** Is your blog about news, politics, travel, or something else? Customize the description accordingly.
* **Tone:** Keep it consistent with your overall website’s style. Do you want to be formal, friendly, or informative?
* **Length:** WordPress tag descriptions are not usually long, so keep it concise.

Remember to choose the description that best fits your needs! Good luck!