BizTalk Maps refer to transformation mappings created using Microsoft BizTalk Server for converting data between different formats, schemas, or message structures within integration workflows. BizTalk Maps use graphical mapping tools or XSLT (Extensible Stylesheet Language Transformations) to define mapping rules, transformations, and validations for transforming input messages into output messages. BizTalk Maps support complex data transformations, conditional mapping logic, and hierarchical data structures to facilitate data integration and interoperability between disparate systems and applications.