AncestryDNA’s ethnicity reports include groups like New England Settlers, New York Settlers, Pioneers, etc. in their ethnicity reports, but they’re really Regional Cultural Groups as described by David Hackett Fischer in “Albion’s Seed, and other cultural historians.
They noticed that the early families who were attracted to settle in various regions of what became the 13 original US states tended to have gravitated towards places where people they knew had already settled and they brought their distinctive ways of speaking, cooking, their religious beliefs, and other shared cultural values with them. New England settllers tended to be Puritans, Royalist refugees from the English Civil War clustered in Maryland (Catholics) and Virginia (Church of England), new York started as a Dutch colony, Pennsylvanians tended to be Quakers, and the pioneer settlers of the Appalchian region tended to be Scots-Irish Presbyterians and Borderers. Later arrivals tended to also settle down in Places where the dominant culture was similar to their own (German and Swiss Mennonites and Amish blended well with the Quakers, while Palatine refugees from Germany and Huguenots from France got along well with the Dutch settlers of New York, etc.)
Since each of these regions was both geographically and culturally distant from the others, people tended to marry within their own regional group. They even tended to stick together as they migrated West - New Englanders, New Yorkers and Pennsylvanians into the midwest, Appalachian pioneers into Arkansas, Missouri, and eventually Northern Mexico (now Texas).
AncestryDNA, by putting DNA evidence together with genealogical information has been able to identify particulr shared genetic patterns that tend to show up in the descendants of each of these population groups and includes it in their ethnicity reports.