--- title: Google Analytics 4 (GA4) — definition for owners | Siite description: "GA4 explained without the jargon: what an event is, which reports a local business actually needs, and how it differs from the old Analytics." url: "https://siite.co/dictionary/google-analytics-4" type: static generatedAt: "2026-10-22T08:21:10.775Z" --- Metrics & Analytics # Google Analytics 4 Google's current analytics platform, built on events rather than pageviews, used to see where visitors came from and which pages produce calls and forms. Also goes by GA4 [![Siite](/images/layout/logo.svg)Written by Siite](/about/)Updated September 8, 2026 ## Entry contents [All Terms A to Z←Browse the full dictionary](/dictionary/) GA4 records everything as an event: a page view, a scroll, an outbound click, a tap on a phone number. Anything you mark as a key event is what older versions called a conversion. That single change is why the reports look unfamiliar to anyone who learned the previous version, and why most businesses use about four percent of the interface. > **Briefly explained** > > - Everything is an event. Conversions are just events you flagged. > - It answers two questions: where people came from, and what they did. > - It cannot see what a call was worth. Only your CRM knows that. > - Three reports cover almost all the value. ## What should be set up before you read anything? The events that matter, recorded properly. Out of the box, GA4 counts views and very little that a local business cares about. - **Phone taps on mobile**, which is where most calls begin - **Form submissions**, confirmed by a real thank-you event rather than an assumption - **Chat conversations started** - **Clicks to a booking tool**, if you use one Mark those as key events. Everything downstream depends on it. See [conversion tracking](/dictionary/conversion-tracking/). ## Which reports are worth your time? The whole job takes about ten minutes a month. - **Traffic acquisition by channel.** Where visits come from, and which of those channels produce key events rather than just arrivals. - **Landing pages with key events.** Which pages do the work. This is where most decisions actually live. - **This period against the same period last year.** See [year over year](/dictionary/year-over-year/), because month-over-month in a seasonal business mostly reports the weather. ## What will it not tell you? That a call became a large job. GA4 sees a tap on a phone number and then nothing. Analytics tells you what happened on the site. The job board tells you what it was worth. Decisions get made where those two meet, and a business that only reads one of them tends to optimize for the cheap half of its leads. ## Why will these numbers not line up with the ad platform? Because each tool answers a slightly different question under its own rules. - Different attribution: GA4 and Google Ads assign credit differently - Different windows: the period a click stays eligible for credit varies - Modeling: GA4 estimates some behavior it cannot observe directly - Consent: what a visitor allows changes what either one can record A persistent gap is normal. A sudden change in the size of the gap is the signal worth chasing. ## What do the terms mean? - **Event:** Anything GA4 records. The basic unit. - **Key event:** An event you marked as a conversion. - **Session:** One visit, with a timeout that ends it. - **Engaged session:** A visit over ten seconds, with a key event or a second page. See [bounce rate](/dictionary/bounce-rate/). - **Channel:** The grouping GA4 files a visit under, such as organic search, paid search or [direct](/dictionary/direct-traffic/). Owner questions ## What owners ask us about Google Analytics 4 ### What is a key event in GA4? +It is what GA4 calls a conversion. An event you marked as important, such as a phone tap or a form submission. ### Why do GA4 and Google Ads numbers differ? +They use different attribution and different windows, and GA4 models some of what it cannot observe. Expect a gap. Investigate only when it is large or moves suddenly. ### Which reports should I actually look at? +Traffic acquisition by channel, landing pages with key events, and this period against the same period last year. Almost everything else is noise for a local business. ### Is GA4 enough on its own? +No. It sees the website. It does not see the phone call that became a large job, which is why the CRM has to sit next to it. ### Is it redundant once call tracking is in place? +Yes, for the picture of how people arrive and which pages do the work. Call tracking answers a narrower question, and the two together answer the useful one.Put this to work ## Guides that use this Step-by-step playbooks from the team, written for owners doing the work themselves. No sign-up and no email required. [### Server-side conversion tracking after iOS: what Texas operators lose Browser pixels lose 30–55% of iOS conversion data in 2026. Server-side restores it. What to install, and the real ROAS lift we measure for Texas operators. Read the guide→](/articles/server-side-conversion-tracking-after-ios/)4.9191 reviewsWhere this turns into work ## Reports that answer something A setup that records the actions that matter, three reports worth reading, and the CRM numbers beside them so the website can be judged on work rather than on visits. [See the service→](/services/marketing-automation/)[Ask us about it](/contact/) ![Leonardo Miodrag, CMO, Partner at Siite](/images/team/panel/leonardo-miodrag.webp) *Our CMO* ## Related entries - [### Conversion Tracking The setup that records which clicks, calls and forms turned into leads or jobs, so ad platforms and analytics can attribute results instead of guessing.](/dictionary/conversion-tracking/) - [### Bounce Rate The share of visits that end without a second action — in GA4, sessions that were not engaged, meaning no meaningful interaction, no conversion and under ten seconds on the page.](/dictionary/bounce-rate/) - [### UTM Parameters Tags appended to a link that tell analytics where a visit came from — the source, medium and campaign written into the URL itself.](/dictionary/utm-parameters/) - [### Organic Traffic Visits that arrive from unpaid search results — the traffic you earned through rankings rather than bought with ad spend.](/dictionary/organic-traffic/) [All terms A to Z Browse every term A to Z Open the dictionary→](/dictionary/)