The GA4 Setup Checklist: Everything to Configure in Your First 30 Days

A GA4 property left on default settings will collect data, but it will collect the wrong data — inflated by bots and internal traffic, missing the conversions that matter, and disconnected from your ad accounts. The setup work you do in the first 30 days determines whether every report you pull for the next two years is trustworthy. Here's the order to do it in.

Week 1: Core Property Configuration

Create your GA4 property inside Google Analytics (Admin > Create Property), and set the correct time zone and currency to match your business, not the default. Install the GA4 tag either through Google Tag Manager (recommended for flexibility) or the gtag.js snippet directly in your site's head. Verify installation immediately with the Tag Assistant Chrome extension or GA4's own DebugView, which shows events arriving in real time as you browse your own site.

Week 1: Data Filters and Internal Traffic

Go to Admin > Data Streams > your web stream > Configure Tag Settings > Define Internal Traffic, and add your office or home IP addresses so GA4 can tag and later filter out your own team's visits. Separately, under Data Settings > Data Filters, enable "Internal Traffic" as an active filter (not just testing) once you've confirmed it's tagging correctly. Also confirm "Exclude all hits from known bots and spiders" is enabled.

Week 2: Conversion Events

Identify every action that represents real business value — purchase, generate_lead, sign_up, begin_checkout — and either rely on GA4's automatically-detected events or create custom ones through Google Tag Manager triggers. Go to Admin > Events > and toggle "Mark as conversion" for each one. Without this step, none of your acquisition or campaign reports will show conversion data, which defeats most of the purpose of the platform.

Week 2: Link Google Ads and Search Console

Under Admin > Product Links, connect Google Ads (if you run paid campaigns) so conversion data flows back for bid optimization, and connect Search Console so you can see organic query data directly inside GA4's Acquisition reports. Both links take a few minutes and unlock reporting that's otherwise impossible to piece together manually.

Week 3: Audiences and Custom Definitions

Build a handful of audiences you'll actually use for remarketing or analysis — "cart abandoners," "blog readers who haven't converted," "high-value repeat purchasers." Register any custom event parameters you're sending (like content category or subscription tier) as Custom Definitions under Admin > Custom Definitions so they become available as dimensions in reports and explorations.

Week 4: Data Retention and Access

Extend event data retention to 14 months (the maximum in the UI) under Admin > Data Settings > Data Retention. Set up user access roles for your team — Viewer for stakeholders who just need reports, Analyst for people building explorations, Editor only for those managing the configuration itself. Finally, export a full raw data feed to BigQuery (free tier available) if you anticipate needing historical or granular analysis beyond what the UI retains.

A Final Sanity Check

• Do a test purchase or lead submission and confirm it appears in DebugView and, 24-48 hours later, in standard reports.
• Compare GA4 session counts against server logs or another tool for a week to catch major discrepancies early.
• Document your setup — data streams, conversion events, filters — so the next person who touches the account doesn't have to reverse-engineer it.

Ongoing Maintenance After Launch

Setup isn't the finish line. Schedule a recurring quarterly review of your GA4 configuration: confirm conversion events still fire correctly after any site changes, check that new pages or products have proper tracking coverage, and review user access to remove anyone who's left the team. GA4 configurations drift silently as sites evolve, and a scheduled review catches that drift before it corrupts months of reporting. For a deeper look at this, see our guide, Tracking & Analytics.

Thirty days of disciplined setup work buys you years of data you can actually trust and act on. For a deeper look at this, see our guide, Facebook & Instagram Ad Campaigns.