CDN

The speed at which your page loads is better if it is loading the image off of your server instead of connecting to another server and loading the image from there. However, you can use a CDN (Content Delivery Network). The way that it works is that the company caches your blog or website in various company-owned data centers. When a visitor visits your site, instead of waiting for the page to load every element and piece of data and image, as if loading for the first time (which is always going to take longer), it connects to the Incapsula CDN and finds the fastest current cached version of the site and loads that.