What is the point of `make dev`?

I do not understand… WHAT IS THE POINT OF make dev if the localhost instance pulls all the files from somewhere else and NOT from the local folder???

It takes configs from the deployment and runs with the UI from source.

You mean, if i have a project that i have cloned from GitHub to my localhost xampp/htdocs folder and i run make dev, it doesn’t reflect on my local installation??

No by default.
But you can run WEBPACK_DEV_SERVER_PROXY_TARGET="https://mydployment.com" make dev and it will use your deployment.