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# Keycloak concepts
In keycloak, you can
### Mapper
In keycloak, you can create a mapper to add any information from the user attributes, groups, audience etc to be mapped to a corresponding client.The various mappers are shown below with multiple options for customisation to map the items as shown in the below picture like User attributes, Group details, User client role etc.
With a mapper like below redash-group-mapper, we can map any part
Check the video for Understanding keycloak more
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### Client Scopes
It's used to add a reusable scope for adding certain configuration to be allowed to used for certain clients. It can be used along with the mappers we learned to