Can you explain what the main HTTP methods are and what they are used for?

The main HTTP methods are used to define the action that the client wants to perform on a resource on the server:

• GET — request to retrieve data from the server. Does not change the state of the resource.
• POST — send data to the server to create a new resource or perform an operation.
• PUT — replace an existing resource or create it if it does not exist.
• DELETE — delete a resource.
• PATCH — partially update a resource.
• HEAD — request only the headers of a resource, without the body.
• OPTIONS — request the available methods for a resource.

For example, when working with REST API:

• GET /users — get a list of users
• POST /users — create a new user
• PUT /users/1 — update the user with id=1
• DELETE /users/1 — delete the user with id=1

These are the main methods that help organize client-server interaction according to HTTP standards.