Here are a few options for the WordPress post tag description, along with rationale, to best suit your needs:

**Option 1: Short & Sweet (Focus on Clarity)**

* **Title:** 部门 (Bùmén)
* **Description:** 用于标记文章所属的单位或部门。 (Yòng yú biāojì wénzhāng suǒshǔ de dānwèi huò bùmén. – Used to tag articles belonging to a unit or department.)

* **Rationale:** Clear, concise, and directly explains the tag’s function.

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

* **Title:** 部门 (Bùmén)
* **Description:** 文章分类标签，标明文章内容与哪个单位或部门相关。例如：市场部、研发部、财务部等。 (Wénzhāng fēnlèi biāoqiān, biāomíng wénzhāng nèiróng yǔ nǎ ge dānwèi huò bùmén xiāngguān. Lìrú: Shìchǎng Bù, Yánfā Bù, Cáiwù Bù děng. – Article category tag, indicating which unit or department the article content is related to. For example: Marketing Department, R&D Department, Finance Department, etc.)

* **Rationale:** Provides examples and explains how the tag is *used* to categorize articles, making it more helpful for users.

**Option 3: Emphasis on Organization (If you’re using tags heavily for website structure)**

* **Title:** 部门 (Bùmén)
* **Description:** 组织文章，按单位或部门进行分类。方便读者快速找到感兴趣的资讯。 (Zǔzhī wénzhāng, àn dānwèi huò bùmén jìnxíng fēnlèi. Fāngbiàn dúzhě kuàisù zhǎodào gǎn xìngqù de zīxùn. – Organizes articles, categorized by unit or department. Makes it easier for readers to quickly find information of interest.)

* **Rationale:** Highlights the purpose of the tag from the user’s perspective – helping them find relevant content.

**Option 4: Most Detailed (When explaining the tag is vital)**

* **Title:** 部门 (Bùmén)
* **Description:** 这是一个关键标签，用于将文章归类至具体的组织单位或部门。这将有助于分类文章内容，使访问者能够轻松找到与特定部门相关的资讯。常见的包括不同的职能部门，例如市场部、销售部、人力资源部等。使用本标签可以让您更有条理地管理文章，并为您的网站用户提供更好的浏览体验。 (Zhè shì yī ge guānjiàn biāoqiān, yòng yú jiāng wénzhāng guīlèi zhì jùtǐ de zǔzhī dānwèi huò bùmén. Zhè jiāng yǒu zhù yú fēnlèi wénzhāng nèiróng, shǐ fǎngwèn zhě nénggòu qīngsōng zhǎodào yǔ tèdìng bùmén xiāngguān de zīxùn. Chángjiàn de bāokuò bùtóng de zhínéng bùmén, lìrú shìchǎng bù, xiāoshòu bù, rénlì zīyuán bù děng. Shǐyòng běn biāoqiān kěyǐ ràng nín gèng yǒu tiáolǐ dì guǎnlǐ wénzhāng, bìng wèi nín de wǎngzhàn yònghù tígōng gèng hǎo de liúlǎn tǐyàn. – This is a key tag used to categorize articles into specific organizational units or departments. This helps classify article content, allowing visitors to easily find information related to a specific department. Common examples include different functional departments, such as the Marketing Department, Sales Department, Human Resources Department, etc. Using this tag allows you to manage articles more systematically and provide your website users with a better browsing experience.)

* **Rationale:** Most thorough, covering the “why” and the “how” of using the tag. Ideal if your users are confused about what to do.

**Choosing the Best Option:**

* **Consider Your Audience:** How familiar are they with your website and how you organize content?
* **Consider the Purpose of the Tag:** Is it primarily for organization, or for helping readers find information?
* **Consider Space:** WordPress tag descriptions are usually shown in the admin panel. You can fit more detail there.

I recommend starting with **Option 2** or **Option 4** (depending on your needs) for the most helpful description. You can always revise later. Remember to enter the description in the “Description” field in the WordPress tag editor.