Final answer:
The GA tracking code sends a pageview hit to Analytics when a webpage is loaded.
Step-by-step explanation:
The GA tracking code sends a pageview hit to Analytics when a webpage is loaded. This hit is triggered by the ga('send', 'pageview') command in the tracking code. It typically appears as a line of JavaScript code that is inserted in the head section of a webpage.
When a user visits a website with the GA tracking code, the pageview hit is sent to Analytics, which records information about the pageview, such as the URL of the page, the title of the page, and the time of the visit. This data is then used to generate reports and insights about the website's traffic and user behavior.
In summary, the GA tracking code sends a pageview hit to Analytics whenever a webpage is loaded and the tracking code is properly implemented on that page.