# Writers

Writers provide an implementation of various `message writers`.
Message writers are services that consume normalized (in `SenML` format)
Mainflux messages and store them in specific data store.

Writers are optional services and are treated as a plugins. In order to
run writer services, core services must be up and running. For more info
on the platform core services with its dependencies, please check out
the [Docker Compose][compose] file.

For an in-depth explanation of the usage of `writers`, as well as thorough
understanding of Mainflux, please check out the [official documentation][doc].

[doc]: http://mainflux.readthedocs.io
[compose]: ../docker/docker-compose.yml