Monorepo
One repository holding many projects at once: several services, the website, and the shared code between them.
What it tells you about a developer
Monorepo experience points to a developer used to changes that cross project lines, and to the build tooling that keeps a large repository fast. Teams running one usually have someone who cares about developer tooling.
A monorepo keeps a company’s projects in a single repository, so one change can update a service and everything that calls it together. The alternative is a repository per project, which keeps each one small and makes shared changes slower. Google, Meta, and a large share of newer startups run monorepos. The choice is about how code is stored, and it does not decide how the code is released.