Grouping a market by country, region (northeast, southeast), or areas within a region is known as segmentation.

The segmentation you're referring to is known as "Geographic Segmentation". This is a common strategy where a business divides its market based on geography. There are several ways that a business can choose to geographically segment the market, such as by country, region (like northeast or southeast), or areas within a region. This type of segmentation can be particularly useful for businesses whose products or services may vary based on location, or for businesses looking to expand into new geographies.

The segmentation you're referring to is known as "Geographic Segmentation". This type of market segmentation divides people on the basis of geography. Your market could be segmented into regions such as cities, counties, states, countries, or international regions like Asia, Middle East, etc. Businesses can choose to operate in one or more geographical regions, and can also choose to operate at the global level.