# Message Filter

The **Message Filter** is a pattern used to eliminate undesired messages from a channel based on a set of criteria.

In Ylem pipelines it can be implemented by checking these criteria in the "[Condition](https://docs.ylem.co/pipelines/tasks-ip/condition)" block. For example, in the pipeline below, it checks the criteria and process message if it matches or sends a notification alert to responsive engineers if it doesn't.

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