What exactly is Jupyterlab and how does it fit into the Jupiter ecosystem? There are notebooks and jupyterlab and jupyterhub, but I haven’t found anything documenting what role each fulfills.
Jupyter Notebooks was the start (of things Jupyter)
Then people said it can be tough for people who want to do data analysis to have to figure out installing python locally and getting everything set up to run notebooks just to open a web browser, so JupyterHub was created so that Data Analyst types didn’t have to worry about any of that, they could just open a web browser and work (also running on a server lets you have a beefy server to connect to).
JupyterLab is the next version of Jupyter Notebooks, separating some of the concerns on the back end and giving a bit of a different interface on the front end.