A global mark is a kind of bookmark that allows us to jump between files.
after set a mark we can snap our cursor back to it with the `{letter} command.**
By default, global marks are persisted between editing sessions
to set a mark.
Set a Global Mark Before Going Code Diving
to find all occurrences of a method called fooBar() in our codebase.
By default, :vimgrep jumps directly to the first match that it finds, which could mean switching to another file.
At this point, we can use the <C-o> command to get back to where we were prior to running :vimgrep.
Try to get into a habit of setting a global mark before using any commands that :
interact with the quickfix list, such as
:grep,:vimgrep,:makeinteract with the buffer and argument lists, such as:args {arglist},:argdo
Note: set a blobal mark any time you see something that you might want to snap back to later.