It can configure systems, deploy software, and orchestrate more advanced IT tasks such as continuous deployments or zero downtime rolling updates.
Ansible by default manages machines over the SSH protocol.
Once Ansible is installed, it will not add a database, and there will be no daemons to start or keep running
You only need to install it on one machine (which could easily be a laptop) and it can manage an entire fleet of remote machines from that central point.