Here are a few options for a description for the WordPress post tag “違法” (Illegal), depending on the intended tone and audience:

**Option 1: Concise and Direct (Good for general use)**

* **Description:** 違法行為，法律禁止。 (Illegal activities, prohibited by law.)

**Option 2: Slightly More Informative (For a legal or activist context)**

* **Description:** 針對各種違法行為的標籤，包括違反法律、法規、或規範的行為。 (A tag for all kinds of illegal activities, including actions that violate laws, regulations, or norms.)

**Option 3: Empathetic and Wider Audience (Useful to engage on social justice)**

* **Description:** 探討涉及違法行為的貼文，包括其原因、影響，以及倡議改變。 (Exploring posts that involve illegal activities, including their causes, impacts, and calls for change.)

**Option 4: Formal and Official (If it used by government resources)**

* **Description:** 標示與法律禁止或違反相關法規之活動的貼文 (Tags for posts related to activities that is forbidden or breaking laws.)

**Key Considerations:**

* **Context:** Consider the overall topic of your blog/website. Is it legal news, social commentary, general information, or something else? The context will influence the best description.
* **Target Audience:** Who are you writing for? A legal audience will appreciate more specific language. A general audience may prefer something clear and straightforward.
* **Purpose:** What do you want the tag to do? Help visitors understand the content, encourage discussion, or raise awareness?

Choose the description that best suits your needs! You can usually enter the description in the “Tag Description” field within the WordPress tag editing interface.