Here are a few options for the WordPress post_tag description “專家講座” in Traditional Chinese, ranging in detail and focus:

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

> 關於由專家主持的講座、研討會和公開活動的標籤。 收集關於特定主題的專業知識分享和討論。

> *Translation: A tag related to lectures, workshops, and public events hosted by experts. Collecting information on expertise sharing and discussions on specific topics.*

**Option 2 (Slightly More Descriptive):**

> 我們標記專家講座，分享來自各個領域專家的見解和知識。 涵蓋深入的討論、實用的建議和最新的行業趨勢。 主要用於收集教育性和啟發性的活動。

> *Translation: We tag expert lectures to share insights and knowledge from experts in various fields. Includes in-depth discussions, practical advice, and the latest industry trends. Primarily used to collect educative and inspiring events.*

**Option 3 (Focus on Learning & Engagement):**

> 探索「專家講座」標籤下的豐富內容。 這裡您可以找到由行業領導者和專家分享的見解，提供寶貴的學習機會和激發思考的討論。 適合希望擴展知識、提升技能，或者參與深度交流的您。

> *Translation: Explore the rich content under the “Expert Lectures” tag. Here you can find insights shared by industry leaders and experts, offering valuable learning opportunities and thought-provoking discussions. Suitable for those who wish to expand their knowledge, enhance their skills, or participate in in-depth exchanges.*

**Option 4 (Shorter & Practical):**

> 尋找「專家講座」？ 這裡包含了由各領域專家主持的演講、研討會和活動！ 收錄專業知識，助你提升自我。

> *Translation: Looking for “Expert Lectures”? This contains lectures, workshops, and events hosted by experts from all fields! Collects professional knowledge to help you improve yourself.*

**Recommendation:**

The best option depends on your audience and the purpose of the tag. **Option 2** is a good balance of descriptiveness and conciseness, and **Option 3** is good if you want to emphasize the learning aspect. Consider your overall blog/website style and choose the option that best fits. When adding the description in WordPress, **use UTF-8 encoding** to ensure the Traditional Chinese characters display correctly. You can also choose to use a slightly different title for the tag like `專家講座系列` to have more consistent look with the description.