The Complete Guide to Growth Tracking & Analytics

Why Startups Need Tracking (And Most Do It Wrong)

Tracking isn't just about Google Tag Manager and UTM parameters. According to Victor and Esther, there are two fundamentally different types of tracking that growth teams need to master:

1. Website tracking: Where traffic comes from, which links drive visits, conversion on landing pages.
2. User behavior tracking: What users do inside your product — which actions, which buttons, which flows lead to conversion and retention.

The second type is where most startups fail. They invest in acquisition tracking but ignore the post-signup experience entirely.

"If you only track acquisition, you're gonna lose a lot of money. You need a model that goes all the way through retained users, active users, churned users. That's when you start building a model for revenue."

— Esther, Growth Analytics Advisor

The 3 Categories of the Growth Tracking Stack

1. Product Analytics (Amplitude, Mixpanel, PostHog)

This is the platform for understanding what users do inside your product. Product analytics answers: what actions do paying users take that free users don't? What does the top 1% of users do that others don't?

Esther's framework: "It's not tech first or tool first. It's: what are your goals? What are you trying to accomplish? How can you get the data to measure what matters?"

2. Customer Data Platform (Segment, RudderStack, Snowplow)

CDPs collect events from your product and distribute them to every tool in your stack. Victor explains: "If you track 'campaign_created' in Segment, it goes to Amplitude for analytics AND to Customer.io for email automation AND to your CRM — all from one event."

3. Cohort Analysis & CRM Integration

Modern analytics platforms let you build user cohorts (e.g., "users who converted to paid within 7 days") and push those cohorts into your CRM, ad platforms, and email tools. This closes the loop between tracking and action.

Building a Tracking Model: Acquisition vs Revenue

"Are you building a model for acquisition, activation, or business outcomes? If your model stops at acquisition, you'll know your inputs and outputs — but only for more leads. Build a model that goes all the way through retained users, and you build a model for revenue."

— Esther, Growth Analytics Advisor

The key insight: B2C companies invested early in post-signup tracking. B2B SaaS companies in France traditionally "solved" retention with large customer success teams instead of data. The smartest growth teams now use the same toolkit regardless of B2B or B2C.

Key Takeaways

1. Track behavior, not just acquisition. Knowing where users come from is step 1. Knowing what they do after is where the money is.
2. Choose tools based on goals, not features. Don't pick Amplitude because it's popular — pick it because you need to understand user journeys.
3. Use a CDP if you have 3+ tools. Without a central event pipeline, you'll end up with inconsistent data across every platform.
4. Build cohorts and act on them. The power of tracking is in creating segments and triggering actions — not just dashboards.
5. Start simple. You don't need every tool on day one. Start with product analytics, add a CDP when complexity grows.

Based on a Growth.Talent LinkedIn Live session (55 minutes) hosted by Jeremy Goillot.