Here are a few options for the description of a WordPress post tag with the title “IgG4” in Traditional Chinese (IgG4 in Traditional Chinese: **IgG4**):

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

* **Description in Traditional Chinese:** 關於IgG4相關資訊的文章，包括IgG4檢測、疾病和治療。
* **Translation:** Articles related to IgG4, including IgG4 testing, diseases, and treatments.

**Option 2 (More Keyword-Rich):**

* **Description in Traditional Chinese:** 包含IgG4免疫球蛋白、IgG4相關疾病、IgG4檢測、IgG4陽性、IgG4相關硬化性疾病(IgG4-related sclerosing disease)等主題的文章標籤。
* **Translation:** A tag for articles related to IgG4 immunoglobulin, IgG4-related diseases, IgG4 testing, IgG4 positive results, and IgG4-related sclerosing disease.

**Option 3 (Focus on the broader context):**

* **Description in Traditional Chinese:** 收集有關IgG4免疫球蛋白及其在診斷和治療各種疾病中作用的文章。
* **Translation:** A collection of articles about IgG4 immunoglobulin and its role in diagnosing and treating various diseases.

**Option 4 (Direct and concise):**

* **Description in Traditional Chinese:** 有關IgG4的信息。
* **Translation:** Information about IgG4.

**Key Considerations when choosing a description:**

* **Target Audience:** Who is your audience? Are they medical professionals, patients, or a general audience? Tailor the language accordingly.
* **Content Focus:** What kind of information do the tagged articles contain? Make sure the description accurately reflects the content.
* **SEO:** Include relevant keywords (like “IgG4檢測”, “IgG4疾病”, etc.) to improve search engine visibility within your site.
* **Length:** Keep the description relatively short and to the point. Typically, descriptions shouldn’t be excessively long as it can impact readability.

Choose the option that best fits your site’s content and goals. Remember to use Traditional Chinese characters in the WordPress tag description field. You can copy and paste from the options above.