Here are a few options for a description, ranging from concise to more detailed, for the WordPress post tag “人口資料” (Population Data) in Traditional Chinese:

**Option 1 (Concise):**

> 關於人口統計、普查數據及人口趨勢的資料。
> *(Kuan yu ren kou tong ji, pu cha shu ju ji ren kou qu shi de zi liao.)*
> *About population statistics, census data, and population trends.*

**Option 2 (Slightly More Detailed):**

> 收錄有關人口的統計數據、人口普查結果、人口結構分析和人口變遷趨勢的資訊。
> *(Shou lu you guan ren kou de tong ji shu ju, ren kou pu cha jie guo, ren kou jie gou fen xi he ren kou bian qian qu shi de zi xun.)*
> *Contains information related to population statistics, census results, population structure analysis, and trends in population changes.*

**Option 3 (Focus on Practicality):**

> 提供有關人口資料的數據、分析和相關研究，方便查閱和了解不同地區的人口狀況。
> *(Ti gong you guan ren kou zi liao de shu ju, fen xi he xiang guan yan jiu, fang bian zha yue he le jie bu tong di qu de ren kou zhuang kuang.)*
> *Provides data, analysis, and related research on population data, making it easy to access and understand the population situation in different regions.*

**Option 4 (Detailed and SEO-friendly, but might be too long for some):**

> 彙集全面的**人口資料**，包括**人口普查**數據、**人口統計**數據、**人口結構分析**、**人口趨勢分析**，以及**出生率、死亡率、移民**等相關數據. 也涵蓋不同地區（如**台灣、香港、中國**等）的人口資料，方便研究人員、學生以及對人口議題感興趣的人士查閱。
> *(Hui ji quan mian de **ren kou zi liao**, bao kuo **ren kou pu cha** shu ju, **ren kou tong ji** shu ju, **ren kou jie gou fen xi**, **ren kou qu shi fen xi**, yi ji **chu sheng lu, si wang lu, yi min** deng xiang guan shu ju. Ye han gai bu tong di qu (ru **tai wan, xiang gang, zhong guo** deng) de ren kou zi liao, fang bian yan jiu ren yuan, xue sheng yi ji dui ren kou yi ti gan xing qu de ren shi zha yue.*
> *This tag collects comprehensive **population data**, including **census** data, **population statistics**, **analysis of population structure**, **analysis of population trends**, and data related to **birth rates, death rates, and immigration**. It also covers population data from different regions (such as **Taiwan, Hong Kong, China**, etc.), making it convenient for researchers, students, and those interested in population issues to access.*

**Key Considerations When Choosing:**

* **Context:** How is the tag used? Is it for internal organization or for public display?
* **Audience:** Who is reading these descriptions? (Researchers, general public?)
* **Character Limit:** WordPress might have a character limit for tag descriptions.

Choose the option that best suits your specific needs! I personally recommend Option 2 or 3 for a good balance of information and conciseness. You can easily adapt them depending on your needs. Remember to put the description within the WordPress tag description field.