Optimizing underperforming display ads: a step-by-step guide from A to Z

Dec 20, 2025

By Team Adyard

When bol ads do not render, many sellers automatically turn to the same buttons: lowering bids, pausing budgets, shutting down campaigns. In practice, this rarely solves the actual problem. Underperforming bol ads are not a coincidence. They result from friction somewhere in the chain between visibility, relevance, conversion, and economy. Those who understand this chain and optimize in the correct order can restore campaigns without blocking growth opportunities. In this blog, we explain step by step how to analyze and optimize bol ads in the correct order, including concrete actions for each phase.

Why Order is Crucial in Bol Ads

Bol operates with an auction system where not only your bid counts, but also your relevance and historical performance. This means that every optimization has a different effect depending on where in the funnel the problem lies.

The biggest mistake we see in accounts:

  • optimizing for ACOS while visibility is too low

  • lowering bids while the listing is the issue

  • pausing campaigns while the product actually needs data

That's why you should always work from top to bottom in the funnel.

Step 1: Visibility, are you participating in the auction?

The first and most important question for underperforming bol ads is simple:
is your ad getting enough impressions?

Without impressions, there is no data, no CTR, and no conversion.

Signs that visibility is the problem

  • Low or erratic impressions

  • Campaigns are running, but hardly provide any data

  • Keywords with hardly any impressions

What this means

Your bid is too low, your relevance is insufficient, or your targeting is too narrow. Bol simply does not allow you to participate structurally.

Concrete actions

  • Increase CPC within your calculated margin

  • Check if keywords logically align with your listing

  • Broaden targeting (e.g., from exact to broad)

  • Check if the product is sufficiently available

Don't do: Lower CPC "because there are no sales."
Without visibility, no campaign can sell.


Step 2: Attractiveness—Do People Click (CTR)?

Are you getting impressions, but hardly any clicks? Then your ad loses the comparison in the search results.

Signs

  • High impressions

  • Low CTR

  • Competitors clearly get more attention

What this means

The shopper sees your ad but deliberately chooses another product.

Concrete actions

  • Analyze your main image within the SERP, not separately

  • Check if your title is clear at a glance

  • Compare your price and reviews with direct competitors

  • Does the ad really match the search intent?

Don't do: Increase bids to compensate for a low CTR.
That only makes bad ads more expensive.

Step 3: Conversion, Do People Buy (CVR)?

If people click but don't buy, the issue lies on the product page.

Signs

  • Reasonable to good CTR

  • Low conversion rate

  • Rising ACOS

What this means

The ad promises something the listing doesn't deliver, or the offering is simply not competitive enough.

Concrete actions

  • Analyze reviews (score, volume, and content)

  • Check price position and delivery time

  • Improve product information and visuals

  • Ensure the listing exactly matches the search intent

Don't do: Pause campaigns because of high ACOS.
Without conversion, ads can never be profitable.


Step 4: Economy, Does ACOS and TACOS Align?

Only when visibility, CTR, and CVR are correct does it make sense to fine-tune economically.

Signs

  • Healthy CTR and CVR

  • ACOS higher than desired

  • Or conversely: low ACOS but little scale

What this means

You are now at the stage where real optimization occurs.

Concrete actions

  • Adjust CPC based on margin and conversion

  • Shift budget to best-performing keywords

  • Exclude weak placements or keywords

  • Consider TACOS in decisions, not just ACOS

Here you determine whether ads contribute to total growth, not just advertising revenue.


Step 5: Strategic Phase, Build or Protect?

Finally, you determine the role of the product within your portfolio.

Actions per product phase

  • Launch: Visibility and data collection over efficiency

  • Scale: Volume, market share, and ranking

  • Profit: Stability, protection, and margin

In this phase, decide consciously:

  • where to keep investing for ranking

  • and where to scale back ads as organic takes over

Why This Approach Works on Bol

Bol rewards consistent behavior, not isolated optimizations, but structural performance over time.

By:

  • analyzing problems in the correct order

  • using the right lever at each step

  • and making decisions based on data rather than emotion

you build an ad system that remains scalable, predictable, and manageable.


Conclusion: Underperforming Bol Ads Are Feedback, Not Failure

If Bol ads are not delivering, that is no reason to panic.
It is an invitation to see where in the chain the friction occurs.

Those who understand these signals and follow the correct order, turn ads from a cost into a growth engine.

And that is exactly where profitable Bol ads start.

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