Amazon s3 is a scalable storage system offered by Amazon Web Services. s3 is purpose-built to store any amount of data, anywhere. With Amplitude Engage, you can sync cohorts to an Amazon S3 bucket. This enables you to effectively export groups of users out of Amplitude and synchronize them with other databases or stored procedures you’ve built off your Amazon S3 bucket. From there, you can use Amplitude cohorts in internal analytics dashboards and internal personalization engines.