Arrays are especially useful when used to contain expanded globs:
bash$ myhomefiles=("$HOME"/*)
bash$ printf '%s
' "${myhomefiles[@]}"
/home/bashuser/code
/home/bashuser/docs
/home/bashuser/music
/home/bashuser/Important Notes.txt
/home/bashuser/**README**
The myhomefiles array defined here contains a list of all files and directories matched by the * glob in our home directory, and stores them safely, even if they contain special characters, such as spaces, asterisks, or even newlines.
If you wish to store arguments for a command to execute later or for a script to iterate through, you should always use arrays (or positional parameters with set --). Never try to separate the files out from a single variable afterwards, with spaces or newlines – it's neither reliable nor safe.