Refresh

On the Force.com platform, refresh usually applies to sandboxes and dashboards. Applied to sandboxes, refresh means to replace the current instance with a new copy of production. Applied to dashboards, refresh means to run the underlying report again to update the dashboard visualization. …


Sandbox

Each org has a limited number of sandboxes available to it, and the type of sandbox determines how often it can be updated to be a fresh copy of the production org. Refresh time varies, and Salesforce sends you an email alert when a requested refresh completes.

For more, see Sandbox Environments in Salesforce Help & Training.

 

Dashboard

Dashboards are based on reports that run intermittently. You can schedule dashboards to refresh on a daily, weekly, or monthly basis. The platform can send you an email alert when a scheduled dashboard refresh occurs.

For more, see Schedule Dashboard Refresh in Salesforce Help & Training.