Here are a few options for a “學生副業” WordPress post_tag description in Traditional Chinese, catering to different nuances:

**Option 1 (General & Concise):**

> 學生在學期間可以嘗試的兼職機會，包括線上、線下各種賺錢方式。

* **Translation:** Part-time job opportunities for students during their studies, including various ways to earn money online and offline.
* **Good for:** A broad overview, suitable for tags that encompass a wide range of student side hustles.

**Option 2 (Emphasis on Flexibility):**

> 適合學生的彈性副業，讓您在學習之餘，也能靈活安排時間賺取額外收入。

* **Translation:** Flexible side hustles suitable for students, allowing you to earn extra income while managing your studies.
* **Good for:** Highlighting the balance between studies and work, emphasizing flexibility.

**Option 3 (Listing Examples):**

> 涵蓋各種學生副業類型，如家教、打工、線上寫作、設計等，提供多元賺錢選擇。

* **Translation:** Covering various types of student side hustles, such as tutoring, part-time work, online writing, design, etc., offering multiple earning options.
* **Good for:** Providing a concrete idea of the types of side hustles included.

**Option 4 (Focus on Skill Development):**

> 幫助學生提升技能，並透過副業賺取收入，為未來職涯奠定基礎。

* **Translation:** Helping students improve their skills and earn income through side hustles, laying the foundation for their future careers.
* **Good for:** More aspirational, highlighting benefits beyond just earning money.

**Option 5 (Short & Sweet):**

> 學生賺錢好幫手! 探索各種兼職機會，增加收入來源。

* **Translation:** Good helper for students to earn money! Explore various freelance opportunities and increase income streams.
* **Good for:** A quick and direct explanation.

**Which one to choose?**

The best option depends on the context of your website and the overall tone you want to set. Consider:

* **Your target audience:** Are they looking for quick money, or are they more interested in personal development?
* **The content of your posts:** What types of side hustles do you predominantly cover?
* **Your overall brand voice:** Are you professional, friendly, or practical?

I recommend starting with either Option 1 or Option 2 as they provide a good balance of clarity and relatability. You can always modify them later based on your experience and audience feedback. Good luck!