# Advanced Kafka consumers

Learn about advanced Kafka consumer configurations, behaviors and optimization strategies for production deployments.

## What you'll learn

- Consumer delivery semantics and reliability guarantees
- Poll behavior and internal thread management
- Offset reset strategies and recovery scenarios
- Geographic optimization with closest replica reading
- Incremental rebalancing and static group membership
- Performance tuning and operational best practices

## Topics covered

- **[Delivery semantics](https://www.conduktor.io/kafka/delivery-semantics-for-kafka-consumers)**: at-most-once, at-least-once, and exactly-once delivery
- **[Consumer important settings](https://www.conduktor.io/kafka/kafka-consumer-important-settings-poll-and-internal-threads-behavior)**: poll behavior and internal threads
- **[Auto offset reset](https://www.conduktor.io/kafka/consumer-auto-offsets-reset-behavior)**: offset reset behavior and strategies
- **[Closest replica](https://www.conduktor.io/kafka/consumer-read-from-closest-replica)**: reading from geographically closest replicas
- **[Incremental rebalance](https://www.conduktor.io/kafka/consumer-incremental-rebalance-and-static-group-membership)**: cooperative rebalancing and static membership