Installing and configuring Upload Progress is entirely optional with Drupal, however it does provide for a more apparent way to display the progress of files that are being uploaded to your website.
With Upload Progress:
Without Upload Progress
Install Dependency Packages for PECL
$ sudo apt-get install php5-dev php-pear build-essential -y
Install the upload progress extension
$ sudo pecl install uploadprogress
Configure Apache to use PECL UploadProgress
$ sudo nano /etc/php5/apache2/php.ini
Scroll Down to the bottom of the file (Ctrl + V), and add the following two lines to the bottom of of the file.
; PECL uploadprogress extension=uploadprogress.so
Save and Exit (Ctrl + X)
Reload Apache to load new settings
$ sudo service apache2 reload
Refresh the Status page to confirm that Upload progress is enabled.Photo: /admin/reports/status