Here’s a description for a WordPress post tag titled “根式” in Traditional Chinese, designed to be informative and SEO-friendly:

**Description:**

涵盖与**根式 (gēnshì)**，即数学中的**根式（radicals）**相关的文章和内容。深入探讨根式的定义、性质、运算规则，包括平方根 (平方根), 立方根 (立方根), 以及更高阶根式的概念。 从基础入门到进阶应用，帮助你理解根式运算，解决数学问题，并在相关的数学领域中得心应手。 适合学习数学、准备考试、或对数学公式研究感兴趣的中文读者。

**Key elements and why:**

* **Focuses on the Keyword:** The description immediately starts with the tag name (“根式”) and its English equivalent (“radicals”). This helps with keyword relevancy.
* **Explains the meaning:** It clarifies what “根式” represents in mathematics.
* **Provides context:** It emphasizes the core concepts (definition, properties, operations, square roots, cube roots, higher order roots).
* **Targets the audience:** It states the target audience (students, exam takers, those interested in mathematics)
* **Encourages engagement:** It aims to help readers understand root operations and problem-solving, making it more engaging.
* **SEO-friendly:** The description uses a mix of keywords related to the topic to improve search engine discovery.
* **Language:** Uses Standard, natural Traditional Chinese.

This description is a good starting point. Remember to tailor it further based on the specific content you are tagging! For instance, if your posts consistently cover more advanced root operations, then the description could focus on those specifically.