It is the feature that integrates other apps/users/logins in Zdoo.
App integration: You can integrate the third party web apps to Zdoo.
User integration: You can gather users together.
SSO: SSO will let you log in once and for all.
Zdoo site is deployed under https and integrated apps are HTTP, so there will be safety warning if you use Firefox/Chrome. You can modify Firefox/Chrome configuration to remove it.