What does platform means??

The device that runs the program (PC, Mobile...)

In CS/IT, platform refers to the computer architecture and equipment which is using a particular operating system.

Platform is a system where you run your program. PC on Windows, PC on Linux, mobile phone, tablet, console - all of them is various platforms.

Platform, all you put first to make the whole thing works 😀

Its a major piece of software, as an operating system, an operating environment, or a database, under which various smaller application programs can be designed to run.