When using shared collections with teams, the environment variables that one person creates get shared out to everyone. This can be useful in 2 scenarios:
- In case of sensitive data, like internal URLs
- In case of dev instances of the same application. When dev teams are using the same collection to test their own individual endpoints, environments get really cluttered.
This feature may also partially solve the need for a private/onsite instance, see feature request on github by another user https://github.com/postmanlabs/postman-app-support/issues/5020