Salesforce Edge Network

Users access your Salesforce data from all over the world. Salesforce Edge Network delivers a consistent user experience regardless of a user's location. It improves download times and users’ network experience, and it’s required for enhanced domains. The move to Salesforce Edge Network is seamless for your end users. They keep using the same URLs to access your org, only with a better experience.
Available in: both Salesforce Classic (not available in all orgs) and Lightning Experience
Available in: Group, Essentials, Professional, Enterprise, Performance, Unlimited, and Developer Editions

Because the user experience is better with Salesforce Edge Network, we're moving qualifying orgs to it. Qualifying orgs include Sales Cloud and Service Cloud orgs that have a deployed My Domain.

Public Cloud, Government Cloud, Customer 360 Data Manager, and some individual orgs are currently excluded from Salesforce Edge Network. Custom domains serving your org’s Salesforce Sites and Experience Cloud sites, such as https://www.example.com, aren't currently supported on Salesforce Edge Network.