What is the main role of the HTTP GET method in client-server interaction?

The HTTP GET method is used to request data from a server. Its main role is to retrieve a representation of the resource without changing the server's state. GET requests should be idempotent and safe, meaning they do not modify data.

Example: a client sends a GET request to a URL, for example, https://example.com/api/users/1, to get information about the user with ID 1. The server responds with data, for example, in JSON format.

In Python, using the requests library, it looks like this:

import requests
response = requests.get('https://example.com/api/users/1')
print(response.json())

Thus, GET is used for retrieving data without side effects.