When a company has enough remote workers in a second location (or if a co-located company plans on expanding into a new location), they may open a satellite office.
A satellite office is a secondary (or second class) office in a different location from the headquarters or main office. A satellite office is usually used by a specific group of people (e.g. sales group, product team or engineering), but can also be built as an extension to the headquarters.
Satellite offices are often criticised because teams in these offices tend to develop their own culture and may get disconnected from headquarters.