Here are a few options for a description of a WordPress post tag with the title “成年” and a brief explanation of each:

**Option 1: Short & Sweet**

* **Description:** 標示與成年相關的文章。 / Signifies articles related to adulthood.

* **Explanation:** This is a concise and direct option, suitable for quick browsing. It simply ties the tag to the broader topic of adulthood.

**Option 2: More Informative**

* **Description:** 標示討論成年、成年禮、法律成年年齡、以及踏入成年階段的文章。 / Signifies articles discussing adulthood, coming-of-age ceremonies, legal adulthood, and entering the stage of adulthood.

* **Explanation:** This explicitly lists the topics associated with the tag, providing more context and helping users understand what kind of content they can find.

**Option 3: Focus on Experience**

* **Description:** 探索有關成年的文章，包括個人成長、責任、生活挑戰和新體驗。 / Explore articles about adulthood, including personal growth, responsibilities, life challenges, and new experiences.

* **Explanation:** This emphasizes the experiential aspects of adulthood, highlighting the reader’s potential takeaway from the tagged content.

**Option 4: Legal Angle**

* **Description:** 標示探討成年後權利與義務、以及法律相關規定與影響的文章。 / Signifies articles exploring the rights and obligations after reaching adulthood, and the relevant legal regulations and their impact.

* **Explanation:** This targets articles focusing on the legal and practical aspects of being an adult.

**How to choose the best option:**
* Consider your blog’s overall theme and typical content.
* Think about the target audience and their expectations.
* Choose the description that most clearly and accurately reflects the content typically tagged with “成年”.

**Important Note:** When adding the description in WordPress, you would typically go to “Tags” or “Categories” in your admin panel, find the tag “成年”, and then fill in the “Description” field with your chosen text. You can also choose an SEO friendly slug.