The HTTP “GET” method is used just for retrieving data and should have no other effect.
When you enter a URI in the browser or you click on a link you are executing a GET request. Here are some characteristics of GET requests: can be cached, bookmarked, appear in browser history.
You can easily find details about all the requests made, when accessing an URI, by opening the Developer Tools in the browser and inspecting the network traffic.
GET requests don’t necessarily have to be made from the browser, you can make AJAX GET requests and use other tools in this purpose.