Top Google Ads Mistakes I Made When I Was Starting Out

When I first started running Google Ads, I honestly thought it was mostly “set it up, let it run, and optimize later.” The more campaigns I launched, the more I realized that tiny setup choices can quietly make or break performance.

Here are the biggest mistakes I made early on — and what I do differently now.

1) I didn’t set location targeting properly

At first, I didn’t pay close attention to Google’s location settings (like whether someone is in the location vs. just interested in it). That meant I was paying for clicks from people who are located in countries outside of my target - and those clicks are cheap and meaningless.

What I do now: I choose the location option intentionally.

2) I didn’t add enough creative

I used to upload the bare minimum: a few images, minimum headlines, a couple descriptions. I didn’t give Google enough variety to test what actually resonates.

What I do now: I treat creative like inventory. I build multiple angles, benefits, and CTAs from the start, giving the algorithm enough to mix and match for best results.

3) I didn’t understand how headlines vs. long headlines vs. descriptions really work

I assumed all the text assets were basically the same thing in different boxes. They’re not. They should work together as a set, but each one needs to bring something slightly different so Google can test different angles.

In short:

• Headlines and long headlines are (mostly) interchangeable, so I treat them like a flexible pool of messages and variations.

• Descriptions shouldn’t blindly repeat the headlines. Their job is to add clarity, context, proof, or details the headlines can’t fit.

• In Search ads, headlines can mix and match, so I write them to make sense in different combinations (not just as a single “perfect” sequence).

What I do now: I write each asset with intent and I always check the ad previews to see how everything looks and reads together across placements.

4) I didn’t tailor the copy to the user’s intent stage

My early ads were generic and feature-heavy. I wasn’t thinking about where the person was in the journey — whether they were discovering, comparing, or ready to act.

What I do now: I match messaging to intent:

• Awareness: problem + relevance

• Consideration: value + differentiation

• Decision: urgency + “remove friction” (pricing, trust, ease)

5) I didn’t fully understand campaign types (and I mixed expectations)

At first, I didn’t clearly understand the difference between Performance Max, Display, Video, and Demand Gen. I treated them like variations of the same thing, then got confused by results and reporting.

In short, Display drives awareness across websites, Demand Gen generates demand via immersive visual content (YouTube/Gmail), and Performance Max automates all, utilizing AI to drive conversions across the entire Google ecosystem.

What I do now: I choose the campaign type based on the goal (conversion vs. awareness), the creative available, and how much control I need.

6) I didn’t watch search terms closely enough

I thought my keyword list controlled everything. Then I realized the real story is in the search terms report — and I was spending on irrelevant queries without noticing.

What I do now: I check search terms early and often, add negatives, delete low performing keywords, and tighten match types when needed.

7) I didn’t check where my ads were actually showing

On Display-style inventory, I wasn’t paying attention to placements. My ads showed up in places that didn’t match the audience or the brand, and I didn’t catch it quickly.

What I do now: I audit placements regularly and exclude what doesn’t perform.

8) I didn’t understand how much the algorithm decides targeting

I assumed my targeting settings were strict rules. In reality, a lot of them are signals, and Google optimizes based on what it thinks will hit the goal — which can be great, but also risky if tracking or goals aren’t clean.

What I do now: I focus on solid conversion tracking, clear objectives, and enough time/volume for learning before I judge performance. It's always better to allow algorithm 7 to 14 days to learn.

9) I thought adding more keywords wouldn’t affect costs

I used to think “more keywords = more opportunities.” But adding too many (especially without a tight structure) can spread budget thin, pull in low-intent traffic, and make optimization harder.

What I do now: I keep keywords tight and intentional, expand based on evidence, and prioritize quality over quantity.

What all of this taught me

Google Ads is an ever evolving a system. The better I got at aligning targeting, creative, intent, and measurement, the more predictable my results became. And I learned pretty quickly that “letting Google figure it out” only works when I’ve set the right foundation.