7 Google Ads and Meta Ads mistakes that are “burning” your budget

Why do ads “eat up” budget without bringing in customers?

It’s rarely the platform’s fault. Google Ads and Meta Ads are systems that learn from the data and settings you give them. If you give them the wrong objective, the wrong page or no measurement at all, they will very efficiently do the wrong thing.

The mistakes below are the ones we see again and again when we audit accounts. None of them needs a bigger budget to fix, just the right settings and a little patience. A good test: if you can’t say how much a new customer costs you from each channel, at least one of them applies to you.

Mistake 1: You don’t measure what your ads bring in

Without conversion tracking, you know how many clicks you paid for but not how many inquiries or sales you got. Worse still, the algorithm doesn’t know which users bring you results, so it can’t find more people like them.

In Google Ads, set up conversion actions or import your GA4 key events. On Meta, the platform itself recommends running the Meta Pixel together with the Conversions API and sending the same events from both, so you don’t lose whatever the browser fails to record.

Before you spend your first euro, make a test purchase or submit a test form and check that it was recorded.

Mistake 2: You choose the wrong campaign objective

Meta optimizes for exactly what you ask it to. If you choose the Traffic objective, it will find people who click on ads a lot, not necessarily people who buy. If you want sales or inquiries, choose the Sales or Leads objective, with the matching conversion event.

The same goes for Google. A Search campaign reaches people who are already searching for what you sell. A campaign that relies on the algorithm, like Performance Max, needs reliable conversion data to perform. Your campaign objective should match your business goal, not the cheapest click. For local businesses, calls or messages are often closer to the real goal than site visits.

Mistake 3: You send all your traffic to the homepage

A user clicked on an ad for “winter boots” and ended up on the e-shop’s homepage. Now they have to search on their own, and usually they don’t.

Google measures this. Quality Score is based on three factors: how likely your ad is to be clicked, how well it matches the search, and how relevant and useful the landing page is. A low score usually means more expensive clicks.

Each ad group needs its own landing page, with the same message, the same offer and a clear next step.

Mistake 4: Keywords without a filter

On Google, you don’t pay for the keywords you chose, but for the searches you showed up for. And those can be very different: an accounting firm targeting “accountant” may be paying for “accountant jobs”.

Every week, open the Search terms report and add negative keywords for anything that isn’t relevant to you. Common ones are “free”, “jobs”, “pdf”, “used” and “what is”. A few minutes a week often save a large part of your budget. If you use broad match, this check matters even more.

Mistake 5: Your location targeting is wider than you think

On Google, the default location setting is “Presence or interest”. In other words, it shows your ads both to people who are in your area and to people who have simply shown interest in it, even if they are somewhere else.

For a hotel, that can be useful. For a local business, like a hair salon in Peristeri, it means clicks from people who will never come in. Google itself recommends the “Presence” option when you want to exclude people who are interested but located elsewhere. Check this setting in every campaign.

Mistake 6: You change everything before the algorithm learns

Every new campaign goes through a learning period (learning phase), when results are unstable. On Meta, an ad set exits it once it gets about 50 results within 7 days of the last significant edit. On Google, the learning period for a Smart Bidding strategy can last up to 2-3 conversion cycles.

If you change your targeting, budget or creative every couple of days, learning starts over from scratch. The same happens when you split a small budget across ten ad sets: none of them gathers enough data. Fewer campaigns, changes made in batches and a week or two of patience almost always bring better results.

Mistake 7: The same creative for months

Even the best ad wears out. When the same audience sees it again and again, frequency goes up, CTR drops and cost per result rises. Meta’s Ads Manager now also shows related indicators, such as “Creative fatigue”, in the Delivery column.

Always have new versions ready: a different opening for the video, another photo, a different angle in the message. And adapt the format to each placement: vertical 9:16 for Reels and Stories, not a horizontal image that gets cropped. Refresh your creative when you see the cost per result rising steadily for one to two weeks, not just because a month has gone by.

A quick check for today

Open your accounts and answer five questions:

• Are purchases or inquiries being recorded correctly?
• Does each campaign’s objective match what you want to achieve?
• Does every ad lead to a relevant page?
• When did you last check your search terms and location setting?
• How old is your creative?

If any answer gave you pause, that’s probably where you’re losing money. At CNCTECH, we audit, set up and manage Google Ads and Meta Ads campaigns, with measurement from day one.