GA4 Setup Essentials: What to Configure First

Google Analytics 4 replaced Universal Analytics as Google’s standard analytics platform, and most businesses now have a GA4 property of some kind. The trouble is that many of those properties were set up in a hurry. The tag is on the site, numbers appear in the reports, and nobody has checked whether those numbers mean what people think they mean.

This guide covers the settings worth configuring first. None of them take long, but together they decide whether your data is something you can make decisions with or something you quietly ignore.

1. Check the basics of the property

Start in the Admin area and confirm the fundamentals are right:

• Time zone and currency. Set these to match how your business reports. A mismatched time zone shifts daily totals, and the wrong currency makes revenue figures misleading.
• Industry category. Pick the closest match. It is a small detail, but it keeps the property tidy.
• Access. Review who has access and at what level. Give people the lowest role they need, and make sure the business, not a former freelancer or agency, owns the account.

2. Extend data retention

GA4 keeps event-level data for two months by default. Standard reports are not affected, but explorations, the more detailed custom analyses, can only look back as far as the retention period allows. In a standard property you can extend this to 14 months.

Do it on day one. The setting is not retrospective, so every week you wait is a week of detailed history you cannot get back.

3. Filter out internal traffic

Your own team visits the website constantly: checking pages, testing forms, looking at prices. Left in, those visits inflate traffic and can distort conversion rates, especially on smaller sites.

In GA4 you define internal traffic by IP address in the data stream settings, then activate the internal traffic filter in the data filters section. It is sensible to leave the filter in testing mode for a few days first, check that it is catching the right visits, and then switch it to active. Remember that filters apply from the moment they are active, not to past data.

While you are there, look at the list of unwanted referrals. Payment providers and booking tools often send users off your site and back again, which can wrongly credit the sale to the payment page rather than the channel that brought the visitor in.

4. Review enhanced measurement

Enhanced measurement automatically tracks events such as scrolls, outbound clicks, site search, video engagement and file downloads. It is useful, but review each option rather than accepting all of them blindly.

• If your site search uses a query parameter other than the common defaults, add it so searches are captured.
• If form interaction tracking fires on things that are not really forms, or records every field click, consider switching it off and tracking form submissions properly instead.
• Check that page views are firing correctly on single-page applications, where the URL changes without a full page load.

5. Decide what counts as a key event

GA4 calls the actions you care most about key events (they were previously called conversions in GA4). This is the most important part of the setup, because it defines what success looks like in every report.

Keep the list short and meaningful. For most businesses that means actions such as:

• A completed purchase
• A submitted enquiry or quote form
• A booking or demo request
• A click on a phone number or email link, if these are genuine routes to a sale

Avoid marking everything as a key event. If scrolling halfway down a page counts as a conversion, your conversion rate will look healthy while enquiries fall. Track softer engagement as ordinary events and keep key events for outcomes that matter to the business.

Where possible, trigger form key events on a genuine success signal, such as a thank-you page or a confirmed submission, rather than a button click. Clicks fire even when validation fails.

6. Set up cross-domain tracking if you need it

If a customer journey moves between domains, for example from your main site to a separate shop, booking system or checkout, configure cross-domain tracking in the data stream settings. Without it, one visit can appear as two separate users, and the second domain often receives the credit for traffic that the first one earned.

7. Handle consent properly

If you have visitors in the UK or the European Economic Area, you need a consent approach that reflects privacy law. Use a consent management platform and implement Google’s Consent Mode so that tags respect the choices people make. Get advice specific to your situation if you are unsure what applies to you. The practical point for analytics is that consent choices affect how much data you see, so it is worth understanding before you compare figures with older reports.

8. Link the tools you already use

GA4 becomes far more useful when it is connected to your other Google products:

• Google Ads. Linking lets you import key events for bidding and see post-click behaviour for your campaigns.
• Search Console. This brings organic search queries and landing page data into GA4.
• BigQuery. Optional, but valuable if you want raw data for deeper analysis or long-term storage.

9. Test before you trust

Once everything is configured, use DebugView and the real-time report to test each key event yourself. Submit a form, make a test purchase if you can, click the phone number. Check that each action appears once, with the right name and parameters. Then write down what you have set up and why, so the next person to open the property does not have to guess.

A quick checklist

1. Time zone, currency and access reviewed
2. Data retention set to the maximum available
3. Internal traffic and unwanted referrals filtered
4. Enhanced measurement reviewed option by option
5. A short list of meaningful key events
6. Cross-domain tracking where the journey spans domains
7. Consent handled and understood
8. Google Ads and Search Console linked
9. Every key event tested and documented

If you would like a second pair of eyes on your property, SEO Fleet’s Google Analytics service can audit your current setup, fix what is missing and make sure the events you rely on are tracked accurately.