Steps - You have to follow the below-delivered steps.

Step 1: We have to install three Ubuntu servers either on any cloud or on a VM.
Step 2: We have to ssh all three servers on any terminal.
Step 3: Now we have to set the hostname of all three servers.
Step 4: After that, we have to create Passwordless SSH Connections with the Master Node to all Ansible Workers Nodes.
Step 5: Now we have to do enter in /etc/hosts file in all Nodes with hostname & their IPs
Step 6: Now we have to install the Ansible Package on the Master Node.
Step 7: Now go to the Ansible inventory file /etc/ansible/hosts & do the entry of worker's nodes.