Most micro-businesses waste months on marketing channels that don't work. They keep posting on social media because "everyone says you should," or they continue paying for ads that haven't generated a lead in three months. The difference between businesses that grow and those that stagnate isn't effort—it's knowing where to direct that effort.
Marketing isn't set-it-and-forget-it. What worked last quarter might be haemorrhaging money this month. The only way to avoid wasting time and budget is to review your channel performance consistently. Not quarterly. Not "when you remember." Monthly.
This article gives you a repeatable 30-minute routine to objectively assess which marketing channels are delivering results and which are draining resources. You'll calculate real ROI, identify your best and worst performers, and walk away with three concrete actions: scale what's working, optimise what's promising, or kill what's failing.
This builds directly on the Monthly Marketing Review Routine you established previously. That checklist helped you gather the data. Now you'll use it to make decisions.
Quick Navigation:
Quick Start: Your 5-Minute Channel Triage
If you need a fast answer to "What's working right now?", follow these five steps:
1. Open your marketing dashboard. Use the marketing dashboard you built in the previous step. If you don't have one yet, open Google Analytics 4 and navigate to Reports > Acquisition > User acquisition.
2. Filter to the last 30 days. You're comparing this month to last month, not looking at all-time data. Recent performance is what matters for immediate decisions.
3. Identify your top 3 traffic sources. Look specifically at which channels contributed to your primary conversion goal—lead forms submitted, purchases completed, or consultation bookings made. Ignore vanity metrics like page views or social media followers.
4. Flag your worst performer. Find the one channel that consumed the most time or money but delivered zero conversions. Not low conversions. Zero.
5. Write down one action for your #1 channel. What's the immediate next step to capitalise on what's working? "Double the budget," "Create three more posts in this format," or "Reach out to five more potential partners."
✅ Completed the quick version? This triage is enough to move you forward. Jump to Double Down: How to Scale What's Working or continue below for the detailed walkthrough, including ROI calculation.
Complete Step-by-Step Guide: Making Data-Driven Decisions
The quick triage gives you direction. This complete process gives you confidence. You'll calculate actual Cost Per Lead (CPL), categorise every channel objectively, and create a documented scorecard you can compare month-over-month.
Step 1: Verify Tracking and Define KPIs (10 minutes)
Your review is only as good as your data. If your tracking is broken, you're making decisions based on fiction.
Open Google Analytics 4 and check that your primary conversion event is recording properly. Navigate to Reports > Engagement > Conversions. You should see your key action (form submission, purchase, booking) listed with a count greater than zero for the last 30 days.
If you see no conversions recorded but you know you've had leads or sales, your tracking is broken. Stop here and fix it first using this conversion tracking setup guide.
Next, confirm your Key Performance Indicators (KPIs). Don't try to track everything. For this monthly review, focus on:
- •Conversion Rate: Percentage of visitors who complete your goal action
- •Cost Per Lead (CPL): Total cost divided by number of leads generated
- •Lead Volume: Raw number of conversions per channel
Ignore impressions, clicks, and follower counts for now. Those are inputs. You're measuring outputs. Read more about which metrics are critical for your business stage.
Step 2: Aggregate the Data and Spot the Trend (5 minutes)
Pull up your marketing dashboard. If you're working directly in GA4, go to Reports > Acquisition > User acquisition.
Compare this month (last 30 days) to the previous period. Most analytics tools have a comparison toggle. You're looking for significant changes—both positive and negative.
Focus on the User Acquisition report in Google Analytics 4 to easily compare channel performance and conversion rates.
Ask yourself:
- •Which channel showed the biggest increase in conversions?
- •Which channel's traffic dropped significantly?
- •Are there any channels with high traffic but zero conversions?
Write down the three biggest changes. These are your investigation priorities. For more detail on reading your GA4 reports, see the beginner's dashboard guide.
Step 3: Calculate Cost Per Lead (CPL) by Channel (10 minutes)
This is the critical analysis step. You need to know what each lead actually costs you.
For paid channels (Google Ads, Facebook Ads, sponsored posts), the cost is obvious—it's what you spent. Pull the total spend from each platform for the last 30 days.
For "free" channels (organic social, SEO, email), calculate your time cost. If you spent 10 hours on social media content and your time is worth £25/hour, that channel cost you £250.
Create a simple table with five columns:
| Channel | Total Cost | Conversions | CPL | Action |
|---------|-----------|-------------|-----|--------|
| Google Ads | £300 | 15 | £20 | Scale |
| Facebook | £200 | 2 | £100 | Kill |
| Organic Social | £250 (10hrs) | 8 | £31.25 | Optimise |
| Email | £0 | 12 | £0 | Scale |
| Referrals | £0 | 5 | £0 | Maintain |
To calculate CPL: Divide Total Cost by Conversions. If you spent £300 on Google Ads and got 15 leads, your CPL is £20.
Use a simple three-column scorecard template to log channel, CPL, and the immediate action (Scale, Optimise, or Kill).
For a detailed breakdown of this calculation, including how to factor in customer lifetime value, see Calculate Your Cost Per Lead and Cost Per Customer.
Step 4: Categorise Channels (Scale, Optimise, Kill) (5 minutes)
Now you make the decision. Every channel falls into one of three categories:
SCALE: Low CPL, high conversion rate, consistent performance. These channels are working. Your only question is "How do I do more of this?" If email generated 12 leads at £0 cost, the action is obvious: send more emails, grow your list, or increase frequency.
OPTIMISE: Medium CPL, good traffic but poor conversion rate. The channel is reaching the right people, but something in your funnel is broken. Usually it's the landing page, the call-to-action, or the offer itself. Don't kill these channels—fix the bottleneck first.
KILL/PAUSE: High CPL, low conversions, excessive time or money spent. If Facebook cost you £200 and generated two leads (£100 CPL), and your average customer value is £150, you're losing money on every conversion. Stop immediately. Read more about when it's time to cut a channel.
The simple decision matrix: If CPL is low and conversions are high, SCALE. If conversions are zero, KILL.
A critical note: Don't let emotion override data. You might love posting on Instagram, but if it hasn't generated a single lead in three months, you are paying for that channel's failure with your time. Stop.
Step 5: Write Down 3 Immediate Actions (5 minutes)
Your review is worthless if you don't act on it. Before you close your spreadsheet, document three specific actions:
Action 1: Scale your best channel. What's the one thing you can do in the next 7 days to get more from your top performer? "Increase Google Ads budget by £100," "Send two emails this week instead of one," or "Create three more blog posts targeting the same keyword theme."
Action 2: Fix or kill your worst channel. If a channel has potential but poor conversion, identify the bottleneck. "Rewrite the Facebook ad landing page headline," or "Add a clearer CTA to Instagram bio link." If it has no potential, set a kill date. "Pause Facebook ads on Friday."
Action 3: Address one technical or process bottleneck. This is often overlooked. Maybe your contact form is broken on mobile. Maybe your email signup isn't syncing to your CRM. Maybe your tracking code isn't firing on the thank-you page. Fix one thing that's preventing accurate measurement or conversion.
Write these actions in your calendar with specific due dates. Vague intentions don't get executed.
Your next step is dedicated to capitalising on your winners: Double Down: How to Scale What's Working.
🎉 Completed? You now have objective proof of what's working and what isn't. You're ready for Double Down: How to Scale What's Working.
Troubleshooting
What's Next: Acting on Your Data
The review is only valuable if you act on it. You've identified your winners and losers. Now capitalise on what's working.
Your immediate next step: Double Down: How to Scale What's Working
This guide walks you through the specific tactics for scaling your best channel—whether that's increasing ad spend, creating more content, or expanding your outreach.
Go Deeper: Advanced Performance Analysis
Once you've mastered the monthly review routine, these advanced guides help you refine your analysis:
- Marketing Attribution: Which Channel Is Really Working? — For a deep dive into complex visitor journey tracking and multi-touch attribution models when customers interact with multiple channels before converting.
- Conversion Rate Optimisation Framework — For understanding the systematic process of improving performance within a channel, rather than just comparing channels to each other.
Other Optimise Guides
Continue building your optimisation routine with these related guides:
- Weekly Marketing Check-In (15-Minute Routine)
- Use NetNav for a Monthly Website Health Check
- Update Old Content to Perform Better
- When to Expand to a New Marketing Channel
- Automating Repetitive Marketing Tasks
- Planning Your Marketing Year (Simple Calendar)
You've successfully identified where your best customers are coming from this month. That's a huge step forward! Ready to move from performance analysis to holistic optimisation? Use NetNav to check your site's overall health across 9 critical pillars and find hidden bottlenecks before they impact your newfound best channel.