We’ve all heard the old adage: what gets measured gets managed. But when it comes to marketing, I’d go one step further—what gets measured gets momentum. Because if you’re not using your data to tweak, test, and supercharge your campaigns, then you’re leaving reach, revenue, and relevance on the table. And who wants to do that?

Whether you’re a one-person consulting business or part of a big, shiny communications team, understanding your audience through their behaviour is priceless. Luckily, we’ve got more tools than ever to help us get under the skin of what really works – and what needs rethinking.

Start with the basics: GA4 and beyond

Let’s talk about Google Analytics 4 (GA4). Yes, I know it’s invoked a collective sigh amongst digital marketers everywhere (new interface, new metrics, where’s the bounce rate gone?) – but it’s a powerful beast once you tame it.

GA4 doesn’t just show you what people are doing on your website. It shows how, when and where—and even why if you’re smart about interpreting the signals. You can track how long people stay on your campaign landing page, whether they interact with your shiny new explainer video, and how many go on to complete your call to action.

And once you’ve got your events and conversions firing properly, you can compare campaign traffic sources: Was that newsletter click-through more valuable than the tweet? Did that PPC spend deliver? It’s like putting your marketing mix through a truth machine.

Emails: your old faithful (with some unexpected twists)

Now, let’s give some love to email newsletters. In an age of TikTok trends and SEO acrobatics, email marketing might seem a bit… old fashioned. But it remains one of the most effective ways to build relationships, share value, and convert leads.

Apps like Salesforce Marketing Cloud and Mailchimp make it incredibly easy to measure your open rates, click-through rates, and subscriber behaviour over time. You can A/B test subject lines, vary your sending times, and even segment your lists based on previous activity.

And here’s one of my favourite little secrets from the field: Friday afternoons. Yes, really. While some marketers assume their audience has mentally checked out by Friday lunch, I’ve often found that B2B emails sent late on a Friday get surprisingly high open rates. Why? Possibly because inboxes are quieter, meetings have slowed, and people finally have a moment to catch up. It’s one of those lovely counter-intuitive insights that you only uncover when you actually look at your data.

(Just don’t take my word for it – test it with your own audience. Marketing isn’t about folklore; it’s about evidence.)

Timing is everything

When you dig into your metrics, you’ll likely spot other trends too. Perhaps your emails perform best first thing Tuesday morning, or maybe your audience is most active on LinkedIn after 8pm. Use that knowledge to shift your scheduling, plan your content drops accordingly, and make timing part of your campaign strategy.

Better still, build a monthly reporting rhythm. You don’t need a 47-page slide deck – just pull together key highlights: traffic trends, campaign engagement, newsletter stats, and one or two useful insights you can act upon. Share it with your team, your stakeholders, or even just your future self. Because marketing isn’t magic. It’s momentum powered by measurement.

Bring your data to life

Finally, remember that data is only powerful when you do something with it. That might mean pausing a campaign that’s underperforming, doubling down on a piece of content that’s catching fire, or tweaking your tone of voice because you’ve realised your audience loves a bit of cheeky charm.

Data isn’t about proving you’re right. It’s about being less wrong tomorrow than you were yesterday.

So, whether you’re digging into GA4 or decoding your Mailchimp metrics, treat your data like a compass, not a conclusion. Let it guide you, surprise you, and – above all – empower you to do better marketing every single day.

Now go forth, dear reader, and supercharge your next campaign. Friday afternoon send, anyone?