Can you explain the main methods of the HTTP protocol and their purpose?

Main HTTP methods and their purpose:

• GET — request to retrieve a resource. Used to fetch data from the server.
• POST — send data to the server to create a new resource or perform an action.
• PUT — replace or update a resource on the server.
• DELETE — delete a resource.
• HEAD — request only the headers of a resource, without the body.
• OPTIONS — request supported methods for a resource from the server.
• PATCH — partial update of a resource.

Example: when loading a page, the browser makes a GET request, and when submitting a form, POST is often used.