Here are a few options for a WordPress post tag description for “可靠性” (Kěkào xìng – Reliability) in Traditional Chinese, ranging in specificity:

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

> 衡量產品或服務在預期壽命中，穩定表現和持續運作的能力。 (Héngliáng chǎnpǐn huò fúwù zài yùqí shòumìng zhōng, wěndìng biǎoxiàn hé chíxù yùnzuò de nénglì.)
>
> *Translation: Measuring a product or service’s ability to perform consistently and operate continuously throughout its expected lifespan.*

**Option 2 (Focusing on Importance of Reliability):**

> 在各個領域中，可靠性是成功的關鍵因素。這包括產品的穩定性、服務的可靠性，以及數據的準確性。 (Zài gège lǐngyù zhōng, kěkào xìng shì chénggōng de guānjiàn yīnsù. Zhè bāokuò chǎnpǐn de wěndìngxìng, fúwù de kěkào xìng, yǐjí shùjù de zhǔnquè xìng.)
>
> *Translation: In various fields, reliability is a key factor for success. This includes product stability, service reliability, and data accuracy.*

**Option 3 (More Technical and Detailed):**

> 指標衡量系統、組件或產品在指定條件下，在特定時期內執行指定功能的能力，且不受故障影響。這涵蓋了失效模式分析、故障排除和風險評估等。 (Zhǐbiāo héngliáng xìtǒng, zǔjiàn huò chǎnpǐn zài zhǐdìng tiáojiàn xià, zài tèdìng shíqí nèi zhíxíng zhǐdìng gōngnéng de nénglì, qiě bù shòu gùzhàng yǐngxiǎng. Zhè hánggài le shīxiào móshì fēnxī, gùzhàng páichú hé fēngxiǎn pínggū děng.)
>
> *Translation: Indicators measuring the ability of a system, component, or product to perform a specified function under specified conditions within a certain period, without being affected by failures. This covers failure mode analysis, troubleshooting, and risk assessment.*

**Option 4 (Simple and User-Friendly):**

> 解釋物品或服務是否能正常運作並保持穩定。 (Jiěshì wùpǐn huò fúwù shìfǒu néng zhèngcháng yùnzuò bìng bǎochí wěndìng.)
>
> *Translation: Explains whether an item or service functions properly and maintains stability.*

**How to Choose:**

* **Consider your Audience:** Who is reading your blog? Are they technical experts or general consumers? Choose the description that best suits their level of understanding.
* **Focus of Your Blog:** Is your blog highly technical, or more focused on general topics?
* **Length:** WordPress will likely truncate longer descriptions. Keep it reasonably concise to ensure it’s fully displayed.

I recommend starting with option 1 or 4 and tailoring it as needed for your specific content and audience. You can always edit the description later if you find it isn’t quite right. Remember to paste this description into the **”Description”** field when you create or edit the “可靠性” post tag in your WordPress admin panel.