Scripts are organized as projects. Projects can be of two types, standalone and bounded to a
gtype (Google Drive native file type, such as Sheets, Docs, and Forms) file. Standalone scripts are created in a separate script file, you can see these files listed among other files in Drive. Bounded scripts are embedded within individual
gtype files and created using the respective applications. As you can see, the standalone script files, among other files in Drive, you can open directly from Drive, but bounded script can be opened within respective applications only. However, bounded script will have more privileges over parent file than standalone scripts. For example, you can get access to the active document within bounded scripts, ...