Marketo Data Replication is a process of integrating and replicating data from Marketo's marketing automation software into other systems or databases. The goal is to overcome API access costs, rate limits, and concurrency limits that come with using Marketo's native APIs. CData Sync is a tool that enables automated, continuous replication of Marketo data into various destinations such as MySQL, SQL Server, Google BigQuery, Amazon S3, and more. It provides flexible options for incremental replication, near real-time reporting, workarounds for API limitations, and reliable connectivity to databases. By using CData Sync, users can overcome the challenges of integrating Marketo data with their existing systems and tools.