Curator, a tool from Elastic, helps manage Elasticsearch clusters by automating daily management tasks such as creating, backing up, and deleting indices. This is particularly useful for time-series data storage like Postmark's email history, where Curator can remove old data after a specified period, ensuring only the last 45 days of activity are searchable. Additionally, Curator provides features to manage snapshots and optimize static indices, further streamlining Elasticsearch operations. By using Curator, Postmark's small team can focus on adding new features while maintaining their infrastructure, thanks to the automated tooling provided by Elastic.