Here are a few description options for the WordPress post tag “康莫德斯” in Traditional Chinese, catering to different SEO and informational goals:

**Option 1: Short & Sweet (Good for General Use)**

* **Description:** 羅馬帝國暴君 康莫德斯 (羅馬帝國暴君 Commodus)。
* **Translation:** Roman Emperor Commodus.

**Option 2: More Informative (Useful for clarifying intent)**

* **Description:** 康莫德斯 (Commodus)，羅馬帝國的無能暴君與其殘暴統治。探究此皇帝的生平、政治生涯以及在歷史上的影響。
* **Translation:** Commodus, the incompetent tyrant of the Roman Empire, and his cruel reign. Explore this emperor’s life, political career, and historical impact.

**Option 3: SEO-Friendly (Includes related terms)**

* **Description:** 康莫德斯 (Commodus) – 羅馬帝國皇帝 與其暴政。了解康莫德斯：羅馬帝國、馬可·奧勒留、角鬥士、暴君、歷史人物。
* **Translation:** Commodus – Roman Emperor and his tyranny. Learn about Commodus: Roman Empire, Marcus Aurelius, Gladiator, tyrant, historical figure.
* **Explanation:** This option uses keywords that people might search for related to Commodus.

**Option 4: Emphasis on Cultural Context (If relevant to your blog)**

* **Description:** 康莫德斯 (Commodus)在電影和遊戲中呈現的形象，以及他作為歷史人物在本質上的探索。 羅馬帝國、角鬥士、歷史、文化研究。
* **Translation:** The image of Commodus presented in movies and games, and the exploration of his nature as a historical figure. Roman Empire, Gladiator, History, Cultural Studies.

**Key Considerations when picking a description:**

* **Purpose of the tag:** What kind of content will be tagged with this?
* **Audience:** Who are you trying to reach?
* **SEO:** Do you want to optimize for search engines?
* **Length limitations:** WordPress tag descriptions often have limits.

**How to add the description in WordPress:**
1. Go to Posts > Tags in your WordPress dashboard.
2. Find the “康莫德斯” tag and click to edit.
3. In the Tag description field, paste the chosen description.
4. Click “Update” or “Save”.

Choose the description that best fits the needs of your WordPress blog and your audience. I recommend SEO-friendly option 3 for it’s usefullness in search.