[[alerting]]
== Alerting Plugins

Alerting plugins allow Elasticsearch to monitor indices and to trigger alerts when thresholds are breached.

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=== Core alerting plugins

The core alerting plugins are:

link:/products/watcher[Watcher]::

Watcher is the alerting and notification product for Elasticsearch that lets
you take action based on changes in your data. It is designed around the
principle that if you can query something in Elasticsearch, you can alert on
it. Simply define a query, condition, schedule, and the actions to take, and
Watcher will do the rest.