Too Long; Didn't Read
A minidump is a file that gets generated by some processes when they crash. They are smaller than core dumps and just provide the required data to perform basic debugging operations.
The minidump file format was invented for use in Windows when the OS encounters an unexpected error. Subsequently, tools such as Google’s Breakpad and Crashpad adopted the same format to generate application crash dumps on multiple platforms. Apps built with Electron also generate minidump files for native crashes (since Electron uses Crashpad).