SSL certificate for api or ansible module

[jk-onnet]

1. Is it compulsory to add SSL certificate validation (validate_certs) to api or ansible module? I know it is mainly for safety and encryption purpose, but not sure how is it affect a production environment.

2. How a remote machine know the SSL public certs of netbox server to perform API request or Ansible module, other than using the browser? Is it using ENV variable (how to define it if so) or search by file module in python/ansible?

3. How to add validate_certs, is it adding the path or I need to browse/curl the website to get the public key? For example, I tested for other netbox module, simply define the path name, it will redirect me to look for the defined public certs. I suffer on using validate_certs on nb_lookup and api (uri module), other netbox module is fine.