Here are a few options for a WordPress post_tag description for “線上課程” (Online Courses) in Traditional Chinese, offering slightly different focuses:

**Option 1: General & Concise**

* **Description:** 探索豐富多樣的線上課程，學習新技能、增進知識，隨時隨地輕鬆學習。 (Explore a rich variety of online courses, learn new skills, enhance your knowledge, and learn easily anytime, anywhere.)

**Option 2: Focused on Benefits**

* **Description:** 彈性自主的線上課程，讓您擺脫時間地點限制，輕鬆學習，提升自我價值。 無論是職業發展，或是個人興趣都可在線找到您的學習樂趣。 (Flexible and independent online courses, allowing you to break free from time and location constraints, learn with ease, and enhance your self-worth. Whether for career development or personal interests, you can find your learning pleasure online.)

**Option 3: Inclusive & Informative**

* **Description:** 涵蓋各個領域的線上課程，包括語言學習、程式設計、商業管理、設計、藝術等。 找到適合您的課程，開始您的線上學習之旅！ (Online courses covering various fields, including language learning, programming, business management, design, art, and more. Find the courses that suit you and start your online learning journey!)

**Option 4: Keyword Heavy (May help with SEO, use with caution to avoid being spammy)**

* **Description:** 線上課程、遠距教學、線上學習、網路課程、MOOCs (大規模開放線上課程)、學習平台。 (Online courses, distance learning, online learning, online classes, MOOCs (Massive Open Online Courses), learning platforms.)

**Key Considerations When Choosing:**

* **Audience:** Who are you trying to reach? This will influence the tone and language used.
* **Content:** What kind of content do you primarily tag with “線上課程”? Tailor the description to fit the content.
* **Length:** WordPress allows for a decent length for post tag descriptions.

I recommend selecting Option 1, 2, or 3 depending on your audience and the focus of your blog. Option 4 may be useful if you are trying to optimize your posts for search engine results, but it may come across more “robotic” and less engaging. Remember to tailor the description to directly reflect what your site actually offers. For example, if you primarily offer courses on software development, that should be included in the description.