Here are a few options for a description for the WordPress post tag “2021” in Traditional Chinese, ranging from simple to slightly more detailed, depending on the purpose:

**Option 1 (Simple & Direct):**

* **繁體中文：** 2021 年發布的文章或相關內容。 (Fántǐ zhōngwén: 2021 nián fābù de wénzhāng huò xiāngguān nèiróng.) – *Translation: Articles or related content published in 2021.*

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

* **繁體中文：** 關於 2021 年的一切，包括新聞、事件、回顧和文章。 (Fántǐ zhōngwén: Guānyú 2021 nián de yīqiè, bāokuò xīnwén, shìjiàn, huígù hé wénzhāng.) – *Translation: Everything about 2021, including news, events, reviews, and articles.*

**Option 3 (If the Website is Focused on a Specific Niche):**

* **Example (If it’s a food Blog):** 繁體中文：2021 年的美食、餐廳、食譜和食物評論。(Fántǐ zhōngwén: 2021 nián de měishí, cāntīng, shípǔ hé shíwù pínglùn.) – *Translation: Gourmet food, restaurants, recipes, and food reviews from 2021.*
* **Example (If it’s a Tech Blog):** 繁體中文：2021 年的科技趨勢、新產品發布和科技新聞。(Fántǐ zhōngwén: 2021 nián de kējì qūshì, xīn chǎnpǐn fābù hé kējì xīnwén.) – *Translation: Technology trends, new product releases, and tech news from 2021.*

**Option 4 (Minimalist and Commonly Used):**

* **繁體中文：** 2021年。 (Fántǐ zhōngwén: 2021 nián.) – *Translation: 2021.* (This is very simple and direct, which in this case may be sufficient.)

**Important Considerations for Choosing:**

* **The scope of your blog:** If you mainly cover a narrow topic, tailor the description (Option 3). If your blog covers a wide range of subjects, Option 2 is better.
* **SEO:** For SEO, the description should be clear, concise, and include relevant keywords. However, don’t overstuff it. It is important to use the correct character for the Tag description for your audience.
* **Readability:** It should be easy for readers to understand what to expect from articles tagged with “2021.”

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

1. **Go to your WordPress admin dashboard.**
2. **Navigate to “Posts” > “Tags” or “Categories.”** (The location might vary depending on your theme).
3. **Find the “2021” tag.**
4. **Look for a “Description” field.** Enter your chosen description here.
5. **Update or Save the tag.**

By selecting the appropriate description, you help visitors and search engines understand what content is associated with the “2021” tag. I recommend Option 1 or 2, or adapting Options based on your content. Good luck!