Identity Governance and Administration (IGA) began going mainstream in 2013 when Gartner first introduced the Magic Quadrant for Identity governance and Administration. The core functionality of most products is identity administration. This set of functionality includes administration of accounts, passwords, access requests, access provisioning, and entitlement management. Its not feasible for a team of people to manually maintain all of the changes to identities, so identity governance and administration products are implemented to make this easier to do. Connectors read data to collect information about who has access to what in your systems.”]
Source: https://medium.com/@graphidentity/what-is-identity-governance-and-administration-iga-fcb04b3e727a