Downloading a Salesforce WSDL (Web Service Description Language) file is a foundational step for developers integrating external systems with Salesforce using the SOAP API. These XML files define the methods, parameters, and data structures available for your specific organization's web services. How to Download Salesforce WSDL Files
To generate and download these files, follow these steps from within your Salesforce org: How to Generate Enterprise WSDL File from Salesforce download salesforce wsdl