Here’s a description suitable for a WordPress post tag with the title “尾巴抖動” (Wěibā Dǒudòng) in Traditional Chinese, playing on the imagery of a wagging tail:

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

> 狗狗興奮的標誌，可愛的小尾巴搖啊搖！一起分享關於尾巴晃動的故事、影片和照片吧！

> *(The sign of a happy dog, the cute little tail wagging! Share your stories, videos, and photos about tail wags!)

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

> 尾巴抖動：狗狗們表達情感的重要方式。從開心、興奮到焦慮、害怕，透過尾巴的擺動，我們可以讀懂牠們的內心世界。 探索更多關於狗狗尾巴語言，以及如何透過尾巴的動作了解你的毛孩。

> *(Tail Wagging: An important way for dogs to express their emotions. From happiness and excitement to anxiety and fear, we can understand their inner world through the wagging of their tails. Explore more about dog tail language and how to understand your furry friend through their tail movements.)*

**Option 3 (Focus on User Engagement):**

> 尾巴抖動，是毛小孩最可愛的表現之一！分享你寵物的尾巴故事，看看牠們開心、撒嬌時的俏皮模樣。 這裡有關於各種尾巴抖動的知識分享，歡迎你加入討論，一起愛護我們的毛朋友們！

> *(Tail wagging is one of the cutest things about our furry friends! Share your pet’s tail stories and see their playful expressions when they’re happy or being affectionate. Here’s a place to share knowledge about all kinds of tail wags, and you are welcome to join the discussion to love our furry friends together!)*

**Key Considerations & Why These Choices Work:**

* **Language:** Traditional Chinese, using appropriate vocabulary and phrasing.
* **Context:** Assuming this tag likely relates to dogs and their behavior.
* **Image and Emotion:** Employs positive and engaging language to evoke images of happy, playful dogs.
* **Call to Action (Engagement):** Encourages readers to share their own stories, photos, or join the discussion. This is crucial for WordPress post tags to foster community.
* **Keyword Inclusion:** Naturally incorporates “尾巴抖動” (tail wagging) so related content will be tagged.
* **Brevity:** WordPress tag descriptions are typically concise.
* **Adaptability:** Choose the option best suiting the type of content you usually post related to tail wagging. If generally informative, use Option 2. If promoting user-generated content, use Option 3.

Remember to choose the description that *best* fits your blog’s style and the content you’ll be associating with this tag. Good luck!