The essentials
- The principle: weekly metrics are there to react (spend, incidents, spikes), monthly ones to decide (cost per enquiry, revenue, trend).
- Every week: Ads spend vs budget, conversions by channel, organic traffic, site health, reviews and messages awaiting a reply.
- Every month: cost per acquisition, conversion rate by source, share of brand traffic, rankings on the target queries, return on investment by channel.
- The rule: 8 to 12 metrics in total; beyond that, nobody reads them.
A KPI only has value if it is read at the right pace by the right person. Too many companies look at their statistics at random, or compile thirty metrics into a monthly report nobody uses. This article proposes a short list, split into two cadences, weekly and monthly, with the thresholds that trigger an action and a reading ritual that is realistic for a small business.
Why two cadences
Metrics do not all have the same volatility or the same usefulness. The cost per click of a Google Ads campaign moves every day and is corrected in a few clicks; the organic conversion rate of a site is read over a month, otherwise statistical noise hides everything. Reading a monthly metric every week creates false alerts; reading a weekly metric once a month lets budgets slip away. The cadence depends on three criteria: volume (under 30 events a week, read it monthly), the ability to act (whatever cannot be corrected quickly is read monthly) and the cost of inaction (spend that runs away is watched weekly).
The weekly KPIs: reacting
| Metric | Source | Action threshold | Action |
|---|---|---|---|
| Advertising spend vs planned budget | Google Ads, Meta Ads | Gap above 15% over 7 days | Adjust bids or caps |
| Conversions by channel (forms, calls, purchases) | GA4, key events | Drop of 30% vs the 4-week average | Check tracking, campaigns, site |
| Organic sessions | GA4 or Search Console | Drop of 20% outside seasonality | Check indexing, incidents, Google update |
| Technical errors (404s, unindexed pages, speed) | Search Console, site health tool | Any new error on a strategic page | Fix within 48 hours |
| Reviews and messages awaiting a reply | Google Business Profile, social media | Any review unanswered for 3 days | Reply |
| Ads cost per conversion | Google Ads, Meta Ads | More than 25% above target over 7 days | Review keywords, audiences, ads |
Six metrics, readable in ten minutes on a Monday morning on a consolidated dashboard. Paid campaigns are covered in detail in the advertising campaign KPIs.
The monthly KPIs: deciding
| Metric | Calculation | 2026 benchmark (small business, services) | Related decision |
|---|---|---|---|
| Overall cost per acquisition | Total marketing spend / new customers | Below 30% of the margin per customer | Budget allocation |
| Cost per enquiry by channel | Channel spend / channel enquiries | SEO €5 to 30, Ads €20 to 80, social ads €15 to 60 | Strengthen or cut a channel |
| Conversion rate by source | Conversions / sessions | 1 to 3% brochure site, 0.5 to 2% e-commerce | Optimise the entry pages |
| Share of non-brand traffic | Non-brand organic clicks / organic clicks | Rising month after month | Judge the SEO work |
| Rankings on the target queries | Average position of the 20 to 50 tracked queries | Quarterly progress | Prioritise content |
| Return on investment by channel | (Attributed revenue − cost) / cost | Positive on every channel kept | Annual review |
These six metrics are read in a 30-minute meeting at the start of each month, over a rolling twelve months to see the trend. The return on investment calculation is detailed in calculating your marketing ROI.
The metrics not to track
- Impressions and reach on their own: they rise with the budget, not with the result. See vanity KPIs.
- The number of followers : useful once a quarter, not every week.
- The bounce rate : gone from GA4 in its historical form, replaced by the engagement rate, which is itself hardly actionable.
- The overall average position in Search Console: it moves with every newly indexed query, without meaning.
The reading ritual
- Monday, 10 minutes: the six weekly metrics on a single screen, with the thresholds in colour. Every alert gives an action assigned within the week.
- First Tuesday of the month, 30 minutes: the six monthly metrics over twelve months, with the person who decides the budget. One decision per metric outside its threshold.
- Every quarter: review the list itself: a metric that has triggered no action in three months leaves the list.
The ritual only holds if the data is consolidated automatically; assembling Google Ads, GA4, Search Console and the Google Business Profile by hand every Monday does not last three weeks. Choosing the tool is covered in the digital marketing dashboard and the selection of metrics by sector in the digital marketing KPIs.
The frequent mistakes
- Comparing one week with the previous one without allowing for public holidays and seasonality: compare with the average of the last four weeks and with the same week the previous year.
- Tracking the cost per click instead of the cost per conversion: a cheaper click that does not convert costs more.
- Reading conversions without checking the tracking: a sudden drop is more often a broken tag than a real problem. See the mistakes in interpreting KPIs.
- Adding up the conversions from Google Ads, Meta and GA4: each attributes in its own way, so the total is wrong.
How GreenRed helps
Rather than juggling several tools, GreenRed's overview brings these metrics together in a single dashboard, compares them over time and tells you which actions come first. You can try it free, with no card, from the Pricing.
Frequently asked questions
How many KPIs should you track in digital marketing?
Between 8 and 12 in total for a small business: 5 to 6 weekly ones to react and 5 to 6 monthly ones to decide. Beyond that, the dashboard stops being read. Every metric must have an action threshold and an owner.
What is the most important KPI in digital marketing?
The cost of acquiring a customer, compared with the margin they bring in. It sums up the effectiveness of every channel. The per-channel metrics (cost per enquiry, conversion rate) serve to explain it and to weigh up choices.
Should you track KPIs every day?
No, except during a short operation (a launch, a sale) or for high advertising budgets. Daily tracking creates reactions to statistical noise. The week is the right cadence to react, the month to decide.
How can you get these KPIs without spending hours compiling them?
With a dashboard that automatically connects GA4, Search Console, Google Ads, social media and the Google Business Profile, and displays the metrics with their thresholds. Looker Studio works if someone can build it and maintain it; an all-in-one platform avoids that burden.