Can I use localhost?
I am using this repl for a test, however I want to apply it to a project. I want to know what exactly remote and local databases are. I also want to know, if someone else from another computer enters information in, and the code says to store it in localhost, can I access that. Like, when they say localhost, does that mean only I can add information to it through the web browser, or does it mean it is hosted on my computer and people can still add information to it?
Localhost is an inbuilt http address that a web server on your computer can use to serve web pages/assets from. It cannot be accessed from outside your computer. Often you can use this IP address, 127.0.0.1, as well as it maps to localhost.
Read this article: https://en.wikipedia.org/wiki/Localhost