GA4 Tracks Almost Nothing Useful Out of the Box. Here Is What to Set Up First.
A default GA4 install tells you how many people visited your site and roughly where they came from. It does not tell you who converted, which channels are profitable, or what your visitors are actually doing. Here is the setup that fixes that.
When you install GA4 with the standard tag and do nothing else, you can see how many people visited your site, roughly where they came from, and what pages they looked at.
That is useful context, but it is not the information you need to make advertising decisions. You cannot see which campaigns produced phone calls. You cannot see which pages led to form submissions.
You cannot see which traffic sources drove actual revenue.
The most important thing to set up first is conversion tracking. For a local service business, that means tracking form submissions and phone clicks as conversion events.
For an e-commerce business, it means connecting GA4 to your purchase confirmation page so every completed transaction gets recorded with the actual order value. Without this, your Google Ads account is essentially flying blind.
The algorithm has no signal to optimize toward.
Google Tag Manager is the right way to set up most of these events without touching your site code directly. You create a container, install one snippet, and then manage all your tracking rules inside GTM. New form? New button?
New page you want to track? You handle it in GTM without a developer. For a small business managing its own site, this is the setup that scales.
The second priority is linking GA4 to Google Search Console and Google Ads. Search Console shows you which organic queries are driving clicks and impressions. Google Ads link means your ad cost and revenue data live in the same place.
When these three tools are connected and your conversion tracking is accurate, you can see exactly which campaigns, which keywords, and which ad groups are producing revenue versus just producing traffic.
That is the baseline for any serious paid search operation.