What does web analytics measure?
Most analytics tools record page views and actions on your site. These actions are often called events. Depending on your setup, an event might be someone opening a page, submitting a form, or buying a product. Google Analytics 4 collects these events from a tagged website through a web data stream, then organizes them into reports.
Those reports show what your setup recorded. To understand why someone left a page or struggled with a form, you may also need customer feedback or a usability test. A page view alone tells you little about whether the visitor found the answer they needed.
Sources: Google Analytics for websites
A simple example
Suppose you run a software website. You have a help article, a pricing page, and a form for starting a trial. You want to know whether people who read the article go on to try the software. Analytics can help you follow those steps, from reading the article to completing the form.
If people open the form but rarely finish it, try filling it out yourself. It may be confusing or broken. If readers rarely reach the pricing page, check whether the article gives them a clear next step. They may also just be looking for help. The report tells you where to look; you still need to check the explanation.
What do the common terms mean?
You'll see a few terms in most reports. A user is a visitor as the tool identifies them, so one person can sometimes be counted more than once. A session groups activity into a visit. A page view counts a page being displayed, and a traffic source tells you how a visit was classified, such as coming from a search engine.
An event is a recorded action. In GA4, you can mark an event as a key event when it matters to your business, such as a completed inquiry. Tools can define their metrics differently, so check the definitions before comparing their numbers. Also use the same dates, timezone, and filters, and check how visitor consent affects what's recorded.
Sources: Google Analytics: key events
How do you get started?
Start with a question you need to answer. For example: which page should you improve to get more completed inquiries? Track the completed inquiry and the steps that lead to it. Test that each action is recorded correctly, then review a complete period before making changes.
Your setup should respect visitors' privacy choices. Keep a note of what you collect and any gaps in the data. Compare the reported inquiries with the ones your business received, so you can check that the numbers make sense.