Google Analytics is the tool most websites use to understand who visits them, where those visitors come from, what they do and which actions turn into business results. Its current version, Google Analytics 4 (GA4), measures websites and apps with an event-based model.

In this guide we explain what Google Analytics does, how GA4 differs from the old Universal Analytics, the account structure, how to install it, the key concepts (events, key events, metrics), the main reports, Explore, UTM parameters, how Analytics relates to Google Ads and Search Console, and common mistakes. For a more practical, step-by-step guide to using the interface, see how to use Google Analytics.

What Is Google Analytics Used For?

  • Measuring how many people visit and how they behave
  • Finding out which channels bring visitors
  • Seeing which pages and content perform
  • Tracking conversions such as purchases, forms and calls
  • Informing marketing, SEO, content and design decisions

What Is Google Analytics 4?

What Is Google Analytics 4?

The current generation of Google Analytics. It uses events as its basic unit: every interaction, including page views, is an event, with parameters that give more detail.

What Is the Difference Between Universal Analytics and GA4?

Universal Analytics was based on sessions and page views, with categories, actions and labels for events. GA4 is event-based, designed for cross-platform measurement (web and app), with more flexible reporting, built-in machine learning features and a stronger focus on privacy.

What Data Does Google Analytics Show?

User Data

Who your visitors are: location, language, device, browser and (where enabled) audience characteristics.

Traffic Sources

Where visitors come from: search, social, direct, referral, email and paid ads.

User Behavior

Which pages they view, how long they engage, what they click and how they move.

Revenue and E-Commerce Data

Purchases, products, quantities and revenue, when e-commerce events are set up correctly.

What Is the Google Analytics Account Structure?

  • Account: the top level, usually one per organization.
  • Property: a website, app or combination you measure; the property holds the data and settings.
  • Data stream: the source that sends data to a property, such as a website or an app.

How Does Google Analytics Work?

A piece of code (the Google tag) on your pages sends events to Google when visitors act. GA4 processes these events, applies its model and presents them in reports.

How to Install Google Analytics

  1. Create a Google Analytics account.
  2. Create a GA4 property.
  3. Add a data stream for your website.
  4. Add the Google tag to your site, by one of these methods:
  5. Test the installation with the Realtime report and DebugView.

What Is a GA4 Event?

An interaction measured by GA4, such as a page view, click, scroll or purchase.

  • Automatically collected events: such as page_view and first_visit.
  • Enhanced measurement events: scrolls, outbound clicks, site search, video engagement and file downloads, which you can switch on.
  • Recommended events: event names Google suggests for common cases, such as purchase and generate_lead.
  • Custom events: events you define for your own needs.

What Is an Event Parameter?

Extra detail attached to an event, such as the page title, product name or value.

What Is a Key Event?

An event you mark as especially important to your business, such as a purchase or form submission. Key events are GA4’s conversions.

Key Events vs. Google Ads Conversions

A key event is a measurement in GA4. A Google Ads conversion is an action Google Ads counts for bidding and reporting. You can import GA4 key events into Google Ads, but they are separate settings, and numbers can differ. See Google Ads conversion value.

What Reports Does Google Analytics Have?

  • Realtime: what is happening now.
  • Acquisition: how users and sessions arrive.
  • Engagement: what they do on the site.
  • Monetization: revenue and e-commerce.
  • Retention: how users return.
  • User attributes: audience information.
  • Tech: devices, browsers and platforms.

What Is the GA4 Explore Section?

A space for building custom analyses.

  • Funnel analysis: where users drop out of a sequence of steps.
  • Path analysis: the routes users take through the site.

What Are Google Analytics Metrics?

  • Active users: users with engaged sessions in a period.
  • New users: people visiting for the first time.
  • Sessions: visits.
  • Engaged sessions: sessions lasting longer than 10 seconds, with a key event or with two or more page views.
  • Engagement rate: engaged sessions divided by all sessions. It is not the same as the old bounce rate; see bounce rate and pogo sticking.
  • Average engagement time: time the site was in focus.
  • Event count and events per user.
  • Key event rate: share of sessions or users with key events.
  • Total revenue.

What Are UTM Parameters?

Tags you add to links so that Analytics knows exactly which campaign, source and medium a visit came from. Use consistent naming (not “instagram,” “Instagram” and “ig” for the same source), and build links with the UTM link builder.

In the Admin area, link your GA4 property to your Google Ads account. This lets you import key events and use audiences for ads. See Google Ads advertising and digital ad management.

What Is the Difference Between Google Analytics and Search Console?

Analytics shows what users do on your site; Google Search Console shows how your site appears and performs in Google Search before the click. They complement each other.

How Is Google Analytics Used in SEO Work?

To see organic traffic, the pages that attract it, how organic visitors behave and whether they convert, so that you can prioritize content and technical work. See how SEO work is done, e-commerce SEO and our SEO consulting.

Google Analytics on E-Commerce Sites

Set up e-commerce events (view item, add to cart, begin checkout, purchase) with correct values and transaction IDs, then analyze the funnel and revenue. See ways to increase e-commerce sales.

How to Use Google Analytics Audiences

Create audiences based on behavior or key events, and use them for remarketing and analysis. Understand your target audience.

Measuring Contact Actions

Measure form submissions, phone and WhatsApp clicks as key events. See how to measure WhatsApp, phone and email clicks with GA4.

If consent banners limit what is collected, your GA4 data will be incomplete. See why GA4 data is incomplete with cookie consent. Also learn to clean noise from your reports; see how to clean referral spam and bot traffic in GA4.

Using Analytics Data to Improve

Use data to test and improve landing pages, calls to action and layouts, with A/B testing and heatmaps. Check mobile experience; see responsive web design.

Common Mistakes in Google Analytics

  • Installing the tag twice. If the Google tag is added to the theme, a plugin and Tag Manager at the same time, events can be counted more than once.
  • Using the wrong measurement ID. Data goes to the wrong property.
  • Measuring only page views. Forms, phone, WhatsApp and purchases must be measured to see business performance.
  • Marking every event as a key event. It reduces the commercial value of reports.
  • Ignoring internal traffic. Visits by staff and agencies can distort reports.
  • Mixing test data with live data.
  • Not using UTM standards. Different names for the same source split your traffic reports.
  • Sending e-commerce values incorrectly. Wrong currency, value or transaction ID makes revenue reports unreliable.
  • Ignoring privacy settings. Without consent management and privacy controls, data quality and compliance suffer.

Google Analytics Checklist

  • GA4 property and data stream created
  • Google tag installed once and tested
  • Enhanced measurement reviewed
  • Key events defined for real business goals
  • E-commerce events and values correct
  • Internal traffic and spam handled
  • UTM standard agreed
  • Consent and privacy settings in place
  • Linked to Google Ads and Search Console

For help setting up measurement, see our digital marketing service, and the digital performance agency article.

Frequently Asked Questions

Is Google Analytics free?

The standard version is free for website and app measurement. Larger enterprise needs have other product options.

What is GA4?

Google Analytics 4, the current event-based version of Google Analytics.

What is the difference between GA4 and Universal Analytics?

Universal Analytics was session- and page-view-based; GA4 is event-based, measures web and apps together and offers more flexible reporting.

What is a key event?

An event you mark as important to your business, such as a purchase or form submission. It is GA4’s equivalent of a conversion.

How do I check that Google Analytics is working?

Use the Realtime report and DebugView to see test events as they arrive.

Are Analytics and Search Console the same?

No. Analytics shows behavior on your site; Search Console shows visibility and clicks in Google Search.