ExifTool is a scripting program (cmd and GUI) that uses custom metalanguage with its own syntax and commands. There are tens of questions about ExifTool on this site already, with valid answers. Thus, the question, just like the others about that tool, belongs here.
In ExifTool commands, what characters should I use to escape a specific text? For example, for -Author=
tag, what characters should I use to escape spaces and an underscore within the text string I provide as the value?