A support file is an essential component of many software applications. It contains important information that assists the main program in running properly. Some synonyms for support file include auxiliary file, resource file, supplemental file, and secondary file. These files may contain vital information such as data, configuration settings, or libraries. A support file may also be referred to as a help file, documentation file, or user manual. A support file is often required to ensure that a program can run smoothly and correctly. Without it, a program may not be able to perform certain functions or may encounter errors and glitches.