API projects are a way to group related tasks together. They can be used to organize tasks by department, team, or any other category that makes sense for your organization.
test
or live
mode.
Having the two spaces enables you to keep your test keys separated, that you know will only ever be used in your local and preview environments. There is no difference in the infrastructure behind the environment.
Projects and Keys are prepended with the markers:
Live live_1i1AdjSvM5UsF---------------------
Test test_1i1AdjSvM5UsF---------------------
In the UI, you will see a toggle to switch between environments: test and live.