Why your ads stopped working

Performance rarely collapses for the reason the account manager gives first. Five things cause almost all of it, and they leave different fingerprints.

The conversation usually starts the same way. The account was fine in March, it is bad now, nothing changed. Something changed. The useful work is finding out which of five things it was, because the fixes have nothing in common.

1. Creative fatigue

The fingerprint: frequency climbing, click-through rate falling, cost per click stable. The same people have seen the same asset too many times.

The fix is new creative, which sounds obvious and is almost never done at the required rate. On an active social account, the main assets need refreshing every four to six weeks, and that means several distinct ideas rather than recolours of one. Most brands produce too little creative and then spend the shortfall on audience experiments.

2. Audience exhaustion

The fingerprint: reach plateauing, cost per acquisition rising steadily rather than suddenly, and the best performing audiences getting smaller.

You have harvested the cheap demand. This is not a problem with the account, it is the account working exactly as designed until the available intent ran out. The fix is upstream: create demand rather than capture more of it. If this is the diagnosis, no amount of optimisation will reverse it, which is the argument in brand versus performance.

3. Tracking broke

The fingerprint: a step change on a specific date, often after a site release, a consent banner change or a tag edit. Conversions reported fall while the finance system shows no such fall.

Check this first, always, because it is free to check and it invalidates every other diagnosis. A platform optimising towards a broken signal degrades fast and silently. See a GA4 setup that survives scrutiny.

4. Competitive pressure

The fingerprint: cost per click rising across the board, impression share falling, no change in your own metrics otherwise.

Somebody funded entered your auction. Nothing is wrong with your account. The options are narrow: pay more, target more precisely, or compete somewhere they are not. Of those, the third is usually the one nobody considers.

5. The offer decayed

The fingerprint: clicks holding, conversion rate falling, sales reporting more price objections.

This is the uncomfortable one, because it is not a marketing problem. A competitor improved, a price moved, a review cycle turned. Paid media is the first place it shows up and the last place it can be fixed. The landing page is worth checking first, since it is cheap to improve and frequently the actual constraint: see landing pages that convert.

How to run the diagnosis

Pull twelve months, not four weeks. Look at frequency, impression share, click-through rate, conversion rate and cost per click as separate lines, because the aggregate number hides which one moved. Mark every tracking or site change on the chart. Then compare against the finance system, since a decline that exists only in the platform is a measurement problem wearing a performance problem's clothes.

Most accounts we look at have two of these at once. The order of repair matters: fix tracking, then creative, then the offer, then the structural question of where demand comes from.