Here are a few options for the post tag description, each with a slightly different focus:

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

> 了解茶胺酸的益處，包括改善情緒、減少壓力、提升睡眠品質等。探索茶胺酸在健康方面的多樣用途。

**Translation:**

> Understand the benefits of theanine, including improving mood, reducing stress, and enhancing sleep quality. Explore the diverse uses of theanine in health.

**Why it works:**

* Directly addresses the topic.
* Uses keywords for search optimization.
* Provides a brief overview of benefits.

**Option 2 (Focus on Lifestyle):**

> 想知道如何透過茶胺酸紓壓、放鬆？這裡提供關於茶胺酸好處的資訊，助您優化生活，提升健康。

**Translation:**

> Want to know how to relieve stress and relax with theanine? Here’s information on the benefits of theanine to help you optimize your life and improve your health.

**Why it works:**

* Appeals to a more lifestyle-focused audience.
* Implies a practical application of the information.

**Option 3 (Focus on Scientific Basis):**

> 探索茶胺酸的科學研究，了解其對大腦健康、身心健康的好處。深入了解茶胺酸的作用機制。

**Translation:**

> Explore the scientific research on theanine and understand its benefits to brain health and physical and mental well-being. Gain an in-depth understanding of the mechanisms of action of theanine.

**Why it works:**

* Targets readers interested in scientific and analytical depth.
* Suggests more detailed content is likely to follow.

**How to choose:**

Consider your target audience and the content of the WordPress post itself. Choose the description that best reflects the post’s content and the type of reader you want to attract. You can also choose to make a tag without any description.