Simply because it will improve a lot of your website loading time.
If you want to make a test to see how your website is performing go to gtmetrix
Now, let`s see how we can solve this problem.
- Go to your WordPress Dashboard
- Click on “Plugins” => “Add New”
- Click on “Install” and “Activate”
Before installing this plugin my website had this metric at 89
After installing the plugin, this metric is at 100
Now, your website has improved the speed too and your visitors will be happier.
If you have any questions please leave me a comment.