Welcome @Martim_Gamer 
Beyond what’s already been said, you will also experience this if you add files to your CMS for certain field types (example: file types, image types, etc…).
Webflow takes the file, however you upload it to them, and in turn re-uploads it into their public CDN (content delivery network).
In many cases, this is a huge benefit for you.
Now your files are served from a location physically close to your site visitor. That means faster download times, which translates into your web pages loading faster.
Are these the answers you were looking for or did you have something different in mind?