# Customizing user pools
<a name="customize"></a>

Cognito user pools expose extension points so that you can shape the sign-up and sign-in experience to your application. Use Lambda triggers to run your own code at key moments in the user lifecycle, and configure the messages and analytics that your user pool sends.

**Topics**
+ [Customizing user pool workflows with Lambda triggers](cognito-user-pools-working-with-lambda-triggers.md)
+ [Messaging and analytics](user-pools-configure-features.md)