Here are a few description options for a WordPress post tag titled “大甲媽祖” (Dajia Mazu), written in Traditional Chinese, with varying degrees of detail, suitable for different uses:

**Option 1: Concise & Standard**

* **(Description):** 台灣重要的媽祖信仰，主要指每年農曆三月於台中大甲鎮瀾宮舉行的巡幸遶境活動。
* **(Translation):** An important Mazu belief in Taiwan, mainly referring to the pilgrimage and procession held at the Dajia Jenn Lann Temple in Taichung during the Lunar March each year.
* **(Suitable For):** General use, when you don’t have much room in the tag description field, or want a quick summary.

**Option 2: Slightly More Detailed**

* **(Description):** 專指大甲鎮瀾宮媽祖，以及其聞名遐邇的遶境活動，為台灣最具代表性的宗教文化之一。涵蓋祈福、遶境、信徒參與等面向。
* **(Translation):** Specifically refers to the Mazu of the Dajia Jenn Lann Temple, and its renowned pilgrimage, one of the most representative religious cultures in Taiwan. It encompasses aspects such as blessing, processions, and follower participation.
* **(Suitable For):** Posts that frequently mention Dajia Mazu, offering a bit more context and highlights key aspects.

**Option 3: Focus on the Annual Procession**

* **(Description):** 指稱每年農曆三月於大甲鎮瀾宮媽祖舉行的盛大遶境活動，為台灣重要的宗教盛事，吸引數百萬信徒參與，祈求平安順遂。
* **(Translation):** Referring to the grand pilgrimage held by the Mazu of the Dajia Jenn Lann Temple every Lunar March. It is an important religious event in Taiwan, attracting millions of believers who come to pray for peace and prosperity.
* **(Suitable For):** Blogs primarily focused on the annual procession or travel around the event.

**Option 4: For Internal Use/Specific Blog Focus**

* **(Description):** 本部落格關於大甲媽祖的相關報導，包括遶境行程、信徒見聞、文化探討、攝影作品等。
* **(Translation):** This blog’s coverage of Dajia Mazu, including the procession route, stories of believers, cultural discussions, and photographic works.
* **(Suitable For):** Blogs that have a dedicated focus on the Dajia Mazu, specifying the content covered.

**How to Choose:**

* **Consider your blog’s scope:** Is your blog focused entirely on religious events, or is it more general?
* **Audience understanding:** How familiar are your readers with Taiwanese culture and traditions?
* **Space limitations:** WordPress tag descriptions have a character limit.

Remember to choose the description that best fits the overall tone and purpose of your blog. You can also easily edit the description later if you decide a different approach is more effective.