Here are a few options for a WordPress post tag description for “淺眠原因” (Qian Mian Yuan Yin – Causes of Light Sleep) in Traditional Chinese, ranging in formality and length:

**Option 1 (Concise & Clear):**

> 探討淺眠的原因，找出影響睡眠品質的因素。 (Tàn tǎo qiǎn mián de yuán yīn, zhǎo chū yǐng xiǎng shuì mián zhì liàng de yīn sù.)
> _Explore the causes of light sleep and identify factors that affect sleep quality._

**Option 2 (Slightly Expanded):**

> 了解導致淺眠的各種原因，包括生理、心理與環境因素，幫助你改善睡眠。(Liǎo jiě dǎo zhì qiǎn mián de gè zhǒng yuán yīn, bāo kuò shēng lǐ, xīn lǐ yǔ huán jìng yīn sù, bāng zhù nǐ gǎi shàn shuì mián.)
> _Understand various causes of light sleep, including physiological, psychological, and environmental factors, to help you improve your sleep._

**Option 3 (More Informative):**

> 探討造成淺眠的各種原因，從壓力、飲食、生活習慣，到身體疾病等，為你提供全面了解，並尋找合適的改善方法。(Tàn tǎo zào chéng qiǎn mián de gè zhǒng yuán yīn, cóng yā lì, yǐn shí, shēng huó xí guàn, dào shēn tǐ jī bìng děng, wèi nǐ tí gōng quán miàn liǎo jiě, bìng xún zhǎo hé shì de gǎi shàn fāng fǎ.)
> _Explore various causes of light sleep, ranging from stress, diet, and lifestyle habits to physical illnesses, to provide you with a comprehensive understanding and help you find suitable improvement methods._

**Key Considerations:**

* **Target Audience:** Who are you writing for? This influences the formality and depth.
* **SEO:** Consider keywords related to sleep issues and causes (e.g., 壓力, 飲食, 睡眠, 改善, 健康) to improve search ranking.
* **Length:** WordPress typically displays a portion of the description, so keep it concise yet informative.

Choose the option that best suits your overall website style and the tone of the content. I’d recommend Option 2 or 3 for a more comprehensive explanation. You can also adjust them further to suit your specific needs.