"Half the budget is wasted" — but which half?
There is a century-old saying in advertising: half the budget is wasted, but nobody knows which half. In traditional advertising this was genuinely true — how many people saw a newspaper ad, who acted on it, was anyone's guess. In digital, that excuse no longer holds. How many people clicked your Google ad, how many bought, which keyword made you money — all of it is measurable. If you are not measuring, you are voluntarily surrendering this advantage and returning yourself to the blind spots of traditional advertising.
What Can You Measure in Digital?
- How many people saw and clicked your ad (reach and click-through rate)
- How much you paid per click (CPC — cost per click)
- How many people visited your site, how many left, how many took action (conversion rate)
- How much it costs you to acquire one customer (cost per acquisition)
- How many liras come back for every lira spent (return on ad spend)
- Which page visitors drop off on (loss points)
- Which campaign, which ad copy, which creative performed better
Measurement with GA4: The 2026 Standard
Google shut down its old analytics system (Universal Analytics) in 2023 and moved to GA4. Today GA4 is the industry standard for website analytics. GA4 tracks visitor behaviour through events rather than page views: every action — filling a form, making a purchase, watching a video — is recorded as a separate event. This makes it far clearer which channel is driving real conversions. Those still using UA code are losing data; GA4 setup is no longer something to postpone.
Decisions Are Made with Data, Not Feelings
Intuitions like "this ad looks great" or "this campaign always works" signal decisions made without data. Measurement ends the debate: whether an ad is working or not, the numbers show it. This means you can test which of two headlines gets more clicks, stop failing campaigns early, and direct budget toward ad sets with strong performance. This is digital channels' greatest strength: every decision can be backed by data.
If you can't measure it, you can't manage it. — Peter Drucker
— Peter Drucker