CDN can protect your servers from DDOS and countless attacks, bots, vulnerabilities. It tends to be patched pretty quickly when there is an issue. It can reduce

CDN can protect your servers from DDOS and countless attacks, bots, vulnerabilities. It tends to be patched pretty quickly when there is an issue. It can reduce cost by offloading, improve performance by distributing content (with or without computing) from a closer location, optimise delivery in many ways, scale with limited cost... Extra cookies and scripts are related to specific features. A good CDN will let you configure exactly what you want. Cloudfront is a CDN. EDIT: The issue is more related to using a third party domain in order to load assets on you website. I agree, that should be done from first party when possible.