Here are a few options for the description of a WordPress post tag “手機費用” (Shǒu jī fèi yòng, Mobile Phone Expenses) in Traditional Chinese, varying in length and detail:

**Option 1 (Concise):**

> 探索手機費用相關資訊，包括帳單、方案選擇、以及如何節省費用。

> (Tànsuǒ shǒujī fèi yòng xiāngguān zīxùn, bāokuò zhàngdān, fāng’àn xuǎnzé, yǐjí rúhé jiéshěng fèiyòng.)

> *Translation: Explore information related to mobile phone expenses, including bills, plan selection, and how to save money.*

**Option 2 (Slightly more detailed):**

> 有關手機費用的文章彙集，涵蓋了帳單明細分析、不同電信公司的方案比較、資費套餐選擇指南、以及節省手機費用的實用技巧。讓你輕鬆掌握手機開支，精明消費。

> (Yǒuguān shǒujī fèi yòng de wénzhāng huìjí, hángài le zhàngdān míngxì fēnxī, bùtóng diànxìn gōngsī de fāng’àn bǐjiào, zīfèi tǎocān xuǎnzé zhǐnán, yǐjí jiéshěng shǒujī fèiyòng de shíyòng jìqiǎo. Ràng nǐ qīngsōng zhǎngwò shǒujī kāizhī, jīngmíng xiāofèi.)

> *Translation: A collection of articles on mobile phone expenses, covering bill breakdown analysis, comparisons of different telecom companies’ plans, guidance on choosing tariff packages, and practical tips for saving on mobile phone costs. Helping you easily understand your mobile phone spending and consume wisely.*

**Option 3 (Focus on User Benefit):**

> 想省錢？這個標籤彙集了所有與手機費用相關的文章。從分析帳單到選擇最划算的方案，再到找出省錢妙招，讓你成為手機費用的專家，不再為超額費用煩惱！

> (Xiǎng shěng qián? Zhège biāoqiān huìjí le suǒyǒu yǔ shǒujī fèi yòng xiāngguān de wénzhāng. Cóng fēnxī zhàngdān dào xuǎnzé zuì huásuàn de fāng’àn, zài dào zhǎo chū shěng qián miào zhāo, ràng nǐ chéngwéi shǒujī fèi yòng de zhuānjiā, bù zài wèi chāo’é fèiyòng fánnǎo!)

> *Translation: Want to save money? This tag collects all articles related to mobile phone expenses. From analyzing bills, to choosing the most cost-effective plans, to finding money-saving tricks, making you an expert on mobile phone expenses and no longer worry about excessive costs!*

**Option 4 (Short and Sweet):**

> 手機費用的資訊，輕鬆管理你的手機開支。

> (Shǒujī fèi yòng de zīxùn, qīngsōng guǎnlǐ nǐ de shǒujī kāizhī.)

> *Translation: Information on mobile phone expenses, easily manage your mobile phone spending.*

**Which option you choose depends on the context:**

* **Concise:** Good if you have limited space or simply want to give a quick overview.
* **More Detailed:** Provides a more comprehensive explanation and helps users understand what to expect.
* **Focus on Benefit:** Attracts readers by highlighting the value they’ll get from exploring the tagged content. This is a good SEO choice.
* **Short and Sweet:** Ideal for blog tags.

I recommend **Option 3** for SEO purposes and user engagement. Choose the one that best fits your blog’s tone and overall content strategy. Remember to save it in the WordPress tag settings. Good luck!