what is the use of storage folder in laravel code example

Example 1: laravel storage folder permissions

cd [..LARAVEL PROJECT ROOT]
sudo find . -type f -exec chmod 644 {} \;
sudo find . -type d -exec chmod 755 {} \;
sudo chmod -R 777 ./storage
sudo chmod -R 777 ./bootstrap/cache/

Example 2: laravel get path to storage folder

$path = storage_path('app/file.txt');

Example 3: use s3 storage laravel

return Storage::disk('s3')->response('images/' . $image->filename);