Amazon ElastiCache is a fully managed in-memory caching service by AWS, supporting Redis and Memcached engines.ElastiCache can be used to cache frequently accessed data and reduce latency, saving on database costs.Common integrations with ElastiCache include EC2/ECS/Lambda, RDS/DynamoDB, API Gateway/AppSync, CloudFront/CDN, and Microservices.Redis in ElastiCache offers advanced use cases like session storage, leaderboards, chat apps, real-time dashboards, geo apps, and ML pipelines.