Why are HTTP request methods used?

HTTP methods (verbs) are used to perform various actions on resources identified by URIs. They standardize the way clients interact with servers.

Main methods:

• GET: Request data from the server. Should not change the server's state (idempotent and safe).
• POST: Send data to the server to create or update a resource. May have side effects (non-idempotent and unsafe).
• PUT: Update or create a resource at the specified URI. Idempotent but not safe.
• DELETE: Remove a resource at the specified URI. Idempotent but not safe.
• PATCH: Partially update a resource. Non-idempotent and unsafe.
• HEAD: Request response headers, similar to GET but without the response body. Useful for checking resource existence or obtaining metadata.
• OPTIONS: Request information about available methods and other options for a resource.

Using these methods ensures structured and understandable web interactions, which is important for API development and testing.