This article provides an overview of different replication modes supported by Airbyte, a popular open-source data integration tool. It covers the ELT approach to data integration and why it is preferred over ETL. The article also explains various concepts such as sync runs, cursors, primary keys, full refresh sync, incremental sync, CDC replication, and more. Furthermore, it discusses the benefits and trade-offs of each replication mode and helps users choose the best option for their use case.