Here are a few options for the description of a WordPress post tag “圖片素材庫” (Image Asset Library/Stock Photo Library) in Traditional Chinese, catering to different needs:

**Option 1: Simple & Direct**

* **Description:** 收集各種圖片、照片、插圖等素材，方便您在網站、部落格或商業活動中使用。
* (Collects various image resources, such as photos and illustrations, for your use on websites, blogs, or business activities.)

**Option 2: Emphasizing Quality & Variety**

* **Description:** 我們的圖片素材庫，提供豐富多樣、高質素的圖片選擇，滿足您不同的設計和內容需求。
* (Our image asset library offers a rich and diverse selection of high-quality images, meeting your various design and content needs.)

**Option 3: Targeting Users**

* **Description:** 尋找網站圖片、部落格插圖？ 這裡整理了大量圖片素材，助您提升內容吸引力，輕鬆美化您的網站。
* (Looking for website images or blog illustrations? We’ve compiled a large collection of image resources to help you enhance the appeal of your content and easily beautify your website.)

**Option 4: Action-Oriented**

* **Description:** 立即瀏覽我們的圖片素材庫，尋找您所需的圖片，提升您的項目及內容的視覺效果。
* (Browse our image asset library now and find the images you need to enhance the visual impact of your projects and content.)

**Why these are good:**

* **Clear and Concise:** They get straight to the point about what the tag represents.
* **Keywords included:** They use words like “圖片” (image), “素材” (resource), “照片” (photo), “插圖” (illustration), which help with SEO.
* **Relevant:** They explain the purpose of the tag in the context of website usage and content creation.
* **Adaptive:** You can choose the one that best represents your content.
* **Easy to understand:** Using commonly used terms that most Chinese readers should be familiar with.

When you enter the description in WordPress, you can use any of these options. Consider which aspects of your image asset library you want to highlight and choose the description that best reflects that! You can always modify it based on your specific content.