Glob or shell globbing refers to the process of matching glob patterns to files in the filesystem. Best to illustrate it with an example: bash shell command cp *.jpg ./thumbnails will copy all files that have .jpg extension to the thumbnails folder. In that context *.jpg is the glob pattern and it will match all the files in the current working directory that have .jpg extension. Think of it as a pattern matching for the filesystem.
What is globster.xyz?
Where is globbing used?
Globbing was first introduced in unix system. It is widely used in many tools these days. Gitignore file of the git version control system is one example. Patterns are used to exclude certain files and folders from being version controlled.
Syntax depends on the particular implementation. Go to glob examples section for minimatch examples.
There are many implementations in almost every programming language.
Python: glob module
If you have any question or suggestions please go to ask question section and start the discussion.