3-5 KPIs for websites and instructions for GA4, GSC and Matomo

3–5 KPIs for Websites, Plus Instructions for GA4, GSC, and Matomo

For most websites and online stores, five indicators are enough: conversion rate, customer acquisition cost (CAC), customer lifetime value (LTV), organic traffic, and average order value (AOV). Each one tells you something different about the business outcome, not just about site traffic. Instead of tracking ten or twenty metrics, pick 3 to 5 KPIs and report on them regularly — that's the only way you'll actually use the data to make decisions.

In short:

• Focus on 3 to 5 KPIs that actually affect business success, and track and report on them regularly for effective decision-making.
• Key website KPIs include conversion rate, customer acquisition cost, lifetime value, organic traffic, and average order value.
• For e-commerce, it's also important to track cart abandonment rate and the LTV-to-CAC ratio, with weekly, monthly, and quarterly reporting recommended.
• For service-based websites, it's essential to measure cost per lead, lead quality, and response time, to avoid losing potential customers.
• When setting up KPIs and reporting, it's important to define targets, assign owners, and automate tracking, without focusing on vanity metrics that don't affect business outcomes.

Table of Contents

• A Quick List of the Most Important KPIs for Websites and Stores
• KPIs by Category: Traffic, Engagement, Conversions, SEO, and Technical Indicators
• KPIs for E-Commerce: Concrete Examples and Calculations
• KPIs for Service-Based and Lead-Gen Websites
• How to Set Up KPIs: Steps, Goals, and Tools
• The Most Common Mistakes When Choosing KPIs and How to Avoid Them
• What to Do When a KPI Triggers an Alarm
• Why Moxy-web Bets on Action, Not Dashboards, When It Comes to KPIs
• How Moxy-web Sets Up KPIs and a Dashboard for Your Website
• Frequently Asked Questions

A Quick List of the Most Important KPIs for Websites and Stores

Before diving into the details, let's look at which indicators actually deserve a spot on your dashboard.

• Conversion rate measures the share of visitors who complete the desired action (purchase, sign-up, inquiry). Track it weekly, since it quickly shows whether a change to the site is working.
• CAC (customer acquisition cost) tells you how much each new customer costs you, across paid and organic channels. Report it monthly, since it changes quickly with advertising campaigns.
• LTV (customer lifetime value) shows how much revenue an average customer brings in over the entire relationship with your business. Check it quarterly, since it changes slowly.
• Organic traffic measures visitors who arrive through search engines without paid advertising. Track it monthly as an indicator of long-term visibility.
• AOV (average order value) tells you how much a customer spends on average in a single purchase. Check it weekly for online stores, since it directly affects revenue.
• Cart abandonment rate (CAR) shows how many purchases stall right before payment. Report it weekly, since it reflects problems in the checkout process.

This list isn't exhaustive, but it's enough to start building meaningful reporting without drowning in data.

KPIs by Category: Traffic, Engagement, Conversions, SEO, and Technical Indicators

Indicators are easiest to understand when split into four clear categories: traffic and reach, engagement, conversions, and SEO and technical site health. This breakdown also helps with reporting, since each category answers a different question about your website.

For traffic, it's not enough to just look at the total number of visits. Segmenting by source — organic, paid, referral, and direct traffic — is key. Conversion rate can differ by as much as tenfold between these groups, which is why an average is often misleading. A visitor arriving through a Google search with clear purchase intent converts differently than someone who clicks a banner ad out of curiosity.

Engagement metrics, such as time on page, bounce rate, and scroll depth, are useful for diagnostics but dangerous as standalone goals. A long time on page can signal interest, but it can also mean confusion, because the user can't find what they're looking for. Always read these metrics alongside conversions, never on their own.

Conversions are the heart of any KPI system. Clearly define what counts as a conversion — a purchase, a submitted inquiry form, or a newsletter sign-up — and measure both the relative conversion rate and the absolute number of conversions. The latter matters because the rate can improve while the absolute number drops due to lower traffic.

SEO and technical indicators, such as keyword rankings, the share of indexed pages, and load speed, help you understand a site's visibility and technical health. A slow site directly hurts both rankings and conversions, so treat them as a connected system, not separate areas.

KPIs for E-Commerce: Concrete Examples and Calculations

For online stores, the set of key indicators is fairly standard: total traffic, traffic sources, conversion rate, average order value, cart abandonment rate, and the LTV-to-CAC ratio. Each one tells you something different about the store's health, so it's worth reading them together.

Take a simple example. If a store generates a certain amount of revenue from a proportional number of orders, you can calculate average order value (AOV). If a lot of started purchases don't result in payment, that may call for action — for example, simplifying the checkout process or adding more payment methods.

An LTV-to-CAC ratio above 3 to 1 is considered a healthy ratio for recurring-revenue business models. If CAC suddenly rises while LTV stagnates, that means advertising is becoming too expensive relative to actual customer value, not just that profit is shrinking.

For online stores, we recommend weekly reporting on CAR and conversion rate, monthly reporting on AOV and CAC, and quarterly review of LTV and the LTV-to-CAC ratio. This rhythm catches short-term issues without overwhelming you with daily monitoring of slow-moving metrics.

KPIs for Service-Based and Lead-Gen Websites

For websites that sell services, the goal isn't an immediate purchase — it's a quality inquiry. Here, the key indicators are cost per lead, lead quality score, and time to first response for a new inquiry. Advanced sales indicators often emphasize the diagnostic value of response time specifically, since a slow response often means a lost customer, regardless of how good the offer is.

The funnel for service-based sites follows a clear sequence: visitor, submitted form, qualified lead, scheduled meeting, signed contract. Track each step of the funnel separately, since it tells you exactly where you're losing potential customers, not just how many you're losing overall.

Check the number of new inquiries and time to first response weekly, since these are operational indicators that require quick action. Check the share of qualified leads and cost per acquired customer monthly, since this data only stabilizes over a longer period.

How to Set Up KPIs: Steps, Goals, and Tools

Setting up a working KPI system follows a simple sequence of steps that most businesses skip through too quickly.

1. Define the business goal. For example, increasing revenue from the online store over the next six months.
2. Choose the KPI that best reflects that goal. For the example above, that's conversion rate.
3. Set a concrete target value. For example, raising conversion rate from 1.5% to 2% within six months, a classic SMART goal — specific, measurable, achievable, relevant, and time-bound.
4. Set up measurement. Google Analytics 4 tracks visitor behavior and conversion events, Google Search Console shows rankings and clicks from search, and Matomo offers a privacy-friendly alternative with local data storage.
5. Set your reporting frequency. Track operational indicators, like CAR, weekly, and strategic ones, like LTV, monthly or quarterly.

You can find a detailed breakdown of setting up events and dashboards in this guide to web analytics for better decisions.

Expert tip: For every KPI, write down the threshold that triggers an alert, and the name of the person responsible for acting on it. Without these two pieces of information, a KPI stays just a number on a screen.

The Most Common Mistakes When Choosing KPIs and How to Avoid Them

The biggest mistake is focusing on so-called vanity metrics — numbers that look good in a report but say nothing about business outcomes. Like counts, total visit numbers without context, or time on page without a link to conversion all fall into this category.

Instead of these metrics, ask yourself whether a change in an indicator actually affects revenue, costs, or customer satisfaction. Kabi advises that businesses focus on traffic, engagement, conversions, and SEO visibility, and choose a small number of indicators that genuinely drive growth.

A quick checklist for auditing your KPIs: does the indicator measure an action, not just attention? Does it have a clear target value? Does someone review it regularly? If the answer to any of these questions is no, the indicator probably doesn't belong among your strategic 3 to 5 KPIs.

What to Do When a KPI Triggers an Alarm

A good indicator isn't just a number — it's a trigger for a concrete action when it deviates from the expected value. Three of the most common situations call for a clear response protocol.

1. Conversion rate suddenly drops. First check for technical causes, such as a broken form, slow page loading, or a payment process error, before changing content or price.
2. CAC rises quickly. Check the performance of individual advertising channels and temporarily redirect budget to those with a better cost-to-return ratio.
3. Organic traffic declines. Check Google Search Console for lost rankings or technical indexing errors, as described in this website optimization guide.

For every alert, assign an owner for the fix and a deadline for checking its effect, otherwise fixes get lost among other tasks. When making changes to the site, always test with an A/B test before permanently removing the old version.

Why Moxy-web Bets on Action, Not Dashboards, When It Comes to KPIs

From experience building websites and online stores for Slovenian businesses, we see the same loop over and over: companies have a dashboard full of charts, but nobody knows who's supposed to act when conversion drops. Analytics without ownership is just decoration.

You can find a practical approach to choosing KPIs and reporting in this article on web analytics for better business decisions. If you're thinking about revamping your measurement strategy, the next step is simple: check which KPIs on your site currently don't have an owner.

— Ziga

How Moxy-web Sets Up KPIs and a Dashboard for Your Website

Instead of setting up Google Analytics 4, events, and reports yourself alongside everything else, you can hand this setup over to a team that builds websites and online stores every day. Moxy-web sets up tracking for conversions, key events, and dashboards so the data is tied to real business goals, not just tools' default reports.

For a smaller project, this means setting up GA4 and Search Console, defining 3 to 5 KPIs, and a monthly report with clear recommendations. For larger stores, it also includes tracking AOV, CAR, and the LTV-to-CAC ratio. For automated team tracking and daily summaries, the Potni nalog solution is also useful, complementing operational reporting.

If you want your website or store to have measurable KPIs instead of random numbers, check out the offering at Moxy-web and request a concrete proposal tailored to your site.

Frequently Asked Questions

Which KPIs matter most for an online store?

Conversion rate, AOV, cart abandonment rate, CAC, and the LTV-to-CAC ratio cover revenue, customer acquisition costs, and the efficiency of the purchase process.

How many KPIs should I track at once?

3 to 5 strategic indicators is recommended, since too many metrics blur your focus and make it harder to actually act on them.

Which tool should I use to track KPIs?

Google Analytics 4 and Google Search Console cover traffic, conversions, and rankings, while Matomo offers an alternative with local data storage for businesses with higher privacy requirements.

How often should I report on KPIs?

Track operational indicators, such as conversion rate and cart abandonment rate, weekly, and strategic ones, like LTV, monthly or quarterly.

What is a vanity metric, and why avoid it?

A vanity metric is a number that looks good but says nothing about business outcomes — for example, total visit count without context about conversions.

Recommended

• A Web Analytics Guide for Better Decisions
• Page Load Speed: A Business Guide for Decision-Makers
• Why SEO Matters for Marketers and Businesses
• How to Optimize a Website for Better Results