Google Tag Manager Expert Services

BigQuery Funnel Analysis for Ecommerce

SQL funnel analysis built from raw GA4 event data in BigQuery

Build ecommerce funnel analysis in BigQuery. SQL queries for multi-step funnel visualisation, drop-off analysis, and conversion rate optimisation using GA4 data.

200+
GTM Containers Audited
98%
Tracking Accuracy Rate
40+
Platforms Integrated
5★
Average Client Rating
BigQuery funnel analysis gives you complete control over funnel definition — any sequence of events, any time window, any segment, without GA4's interface limitations. We build funnel analysis SQL for your key user journeys: product page → cart → checkout → purchase, landing page → form → thank you, and any multi-step flow specific to your business. Results feed directly into Looker Studio or your BI tool of choice.

Ready to Get Your Tracking Set Up Properly?

What's Included in This Service

Everything you need for accurate, reliable tracking — delivered end-to-end.

Custom funnel query for any event sequence

Drop-off rate analysis at each funnel step

Funnel segmentation by acquisition source, device, cohort

Time-to-convert distribution analysis

Funnel comparison across time periods

Looker Studio funnel visualisation connection

How We Work

Our proven 4-step process delivers results every time.

01

Discovery & Audit

We review your existing tracking setup, identify gaps and issues, and define the exact scope of work needed.

02

Implementation Plan

We design the data layer schema, tag architecture, and consent configuration before touching anything.

03

Build & QA

All tags, triggers, and variables are built in a GTM workspace and verified in Preview mode before publishing.

04

Verify & Handover

Test conversions, GA4 DebugView confirmation, and full documentation handed to your team.

Why Choose Adslytics?

Google Tag Manager Experts Only

Our GTM experts focus exclusively on GTM, GA4, and conversion tracking — not generalist digital marketing.

Data-Verified Results

Every implementation is cross-referenced against backend data — not just assumed to be working.

Full Documentation

You receive a complete implementation specification — not a black box you are dependent on us to maintain.

Fast Turnaround

Most setups and audits are delivered within 2–5 business days, not weeks.

What Our Clients Say

Real results from real businesses.

"Adslytics did a great job with our GA4 analysis and report. They were able to put complex analytics data into a very understandable document for our client. Highly recommend!"

Eric H.

Digital Agency Owner

"The team was quick with responses, very knowledgeable about issues, and helpful throughout the process. I appreciated their work habits and would hire Adslytics again."

Nick T.

Marketing Manager

"Adslytics is a very professional agency that managed our project successfully. They delivered exactly what was promised and I will definitely hire them again in the future!"

Hady M.

E-commerce Business Owner

Ready to Get Started with BigQuery Funnel Analysis for Ecommerce?

Get accurate conversion tracking that powers smarter ad decisions. Book a free 30-minute consultation.

Frequently Asked Questions

GA4 funnel reports are sampled above certain data volumes and limited in segment options. BigQuery funnels are unsampled, fully customisable, and joinable with any other data.
Yes — because you have user-level event data, you can define funnels across multiple sessions (e.g., first visit → email signup 3 days later → purchase 7 days after that).
By querying sequences of events for the same user_id within a defined time window. We use window functions (LEAD, LAG) or conditional aggregation to track step completion per user.
Yes — BigQuery retains all historical data. We write queries comparing funnel metrics for any two time periods, enabling clean before/after analysis.
Looker Studio has a funnel chart component. Power BI and Tableau also support funnel charts. We format the query output to match the input format each tool expects.

BigQuery Funnel Analysis for Ecommerce — Done Right, First Time.

Stop losing revenue to broken tracking. Get it fixed today.

Talk to Us, It's Free

We are always willing to help. Let us know what you are looking for, and we will develop a unique solution for you.

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Business Hours

Our support Hotline is available 24 Hours

Toll Free

+1 (818) 245-8385