Repository
A project folder on GitHub holding the code plus the full history of every change ever made to it.
What it tells you about a developer
Repositories a developer created themselves show what they build when nobody assigns them work. Original repositories with real documentation say more than forked copies.
Everything on GitHub lives in repositories. A repository records who changed what and when, so individual credit inside a shared project stays traceable for years. Repositories are public, meaning anyone can read them, or private, meaning the owner and their invitees can.