Having built or updated a process flow, it must be deployed and enabled before it runs automatically, according to defined trigger shape settings (or API requests). How you do this depends on whether the virtual environments feature is enabled for your company profile.
If yes, you have the option to enable/disable specific deployments of a process flow (bearing in mind that any version of a single flow can be deployed to multiple environments). There are multiple ways to do this - for details, please refer to Enabling & disabling a flow deployment (with virtual environments).
How do I know if virtual environments are enabled?
If you're not sure whether virtual environments are enabled, check the left-hand navigation menu - if you see a virtual environments section, this feature is enabled: