How is the information transferred from the checkbox?

In a form , while using multiple input tags having the same name attribute of type “checkbox”
input type=“checkbox”
when we select multiple checkboxes , how the information is stored and transferred from the form to the action attribute?
By information , I mean multiple values from the selected checkboxes (input tags).

The action attribute contains the URL of the form handler, typically a server-side script that parses the query string attached to the request. On the client side, form values are transformed into that query string on Submit. This is done internally by the browser.