What task does the Swagger tool help solve during API development?

Swagger is a tool for automating the process of developing, documenting, and testing APIs. It helps to:

• Create interactive API documentation that is understandable and accessible to developers.
• Generate API descriptions in the OpenAPI Specification format (formerly Swagger Specification).
• Automatically generate client code and server stubs based on the specification.
• Test APIs directly from the documentation.

An example of usage in C# is connecting Swagger through the Swashbuckle package for automatic documentation generation for ASP.NET Core Web API.