Salt is an orchestration/configuration management tool that, along with Puppet and Ansible, is one of the most prominent representatives of its type.
Salt represents the best of two worlds: On the one hand, Salt allows automated configuration management by using a master client principle similar to Puppet.
On the other hand, Salt like Ansible can also be used without a client and via SSH. A unique selling point of Salt is the reactor system. This allows actions to be triggered fully automatically in response to certain events, for example. Rebooting a system after installing updates.