Here are a few options for a description of the WordPress post tag “感謝文” (Gǎnxiè Wén – Thank You Note/Letter) in Traditional Chinese, varying in length and focus:

**Option 1 (Short & Sweet):**

> 此標籤用於標記表達感謝之文章。

Translation: This tag is used to mark articles expressing gratitude.

**Option 2 (Slightly More Descriptive):**

> 使用此標籤分類分享感謝之情、致謝他人、或表達感恩的文章和帖子。

Translation: Use this tag to categorize and share articles and posts that express gratitude, thank others, or express thankfulness.

**Option 3 (Emphasizing Context):**

> 凡是以感謝為主題的文章、信件，或是分享感恩之情的內容，都可使用此標籤。 包括對親友、同事、或任何幫助過你的人表示感謝。

Translation: This tag can be used for any article, letter, or content sharing expressions of gratitude. This includes expressing thanks to friends, family, colleagues, or anyone who has helped you.

**Option 4 (More Formal):**

> 此標籤集合了所有表達感謝之意，旨在分享感恩、致謝、或感謝他人之文章。 希望藉此鼓勵更多人表達對他人的感激之情。

Translation: This tag gathers all articles expressing gratitude, with the aim of sharing thankfulness, expressing appreciation, or thanking others. It hopes to encourage more people to express their appreciation for others.

**Which Option to Choose:**

* **Consider your website’s style.** If your website is more casual, Option 2 or 3 may be best. If it’s more formal, Option 4 might fit better.
* **Think about the context of the “感謝文”.** Are they personal notes, professional thank-you letters, or something else? This will influence the tone and level of detail.
* **Keep it clear and concise.** Regardless of the length, the description should be easy to understand and accurately reflect what content should be tagged with “感謝文.”

You can choose the one that seems most suitable for your needs! Remember you can amend the description later on if you think needs a change.