Symbol files are a critical component of getting useful data from your crashes. They are required by many of our SDKs and can be uploaded and managed via the Symbols page.
What are Symbols?
Symbols are files that contain information to map information in the minidump file to file names and line numbers in source code.
For Crashpad applications, symbols are files with .sym extensions and can be uploaded automatically via symupload.
For OS X applications, symbols are files with .app and .dSYM extensions and can be uploaded automatically in a post-archive build action.