What are the concepts of demography

What are the common concepts and indicators of demography?
Population statistics include indicators that measure the population size, sex ratio, density and dependency ratio while vital statistics include indicators such as birth rate, death rate, and natural growth rate, life expectancy at birth, mortality and fertility rates..
What are the concept of demographic characteristics?
variables within a nation's population, such as age, gender, income level, marital status, ethnic origin and education level; demographic characteristics are commonly used as a basis for market segmentation..
What are the concepts of demographic data?
Demographic data can come in many forms, but most often describes the distribution of characteristics found in populations such as age, sex/gender, marital status, household structure, income, wealth, education, religion, and so on - and to see how these are changing over time..

This is a list of Indian reservations and other tribal homelands in the United States.
In Canada, the Indian reserve is a similar institution.

What are the common concepts and indicators of demography?