Facebook Ads Targeting: The Mistakes That Wreck Your ROI

Targeting That's Too Broad or Poorly Defined

The most common mistake in Facebook Ads targeting is aiming for too broad an audience, hoping to reach as many people as possible in the process. This approach dilutes the ad budget across profiles unlikely to have any real interest in your offer, and quietly drives up the cost per result over time. Narrower targeting, even if it reaches fewer people overall, generally delivers a much better return on investment per dollar spent.

Overlooking Audiences You Already Have

Many businesses fail to use custom audiences built from their own data: site visitors, existing customers, newsletter subscribers who already know the brand. These audiences, already familiar with your business, generally convert far better than a completely cold audience seeing your name for the first time. Lookalike audiences, automatically generated by Meta from your best customers, then let you intelligently expand your reach without starting the targeting process from scratch each time.

Not Excluding the Wrong Audiences

Just as important as positive targeting, excluding certain audiences often meaningfully improves results: excluding people who've already converted, or those clearly outside your service area, avoids wasting budget on profiles that will never generate a result no matter how many times they see the ad. To dig deeper into these best practices, check out our complete Facebook and Instagram Ads guide and the dedicated section, or hire a specialised freelancer to audit your current targeting.

Mixing Up Awareness and Conversion in the Same Targeting

Another common mistake is using the same targeting for different objectives, when an awareness campaign and a conversion campaign call for genuinely distinct audiences and messages tailored to each stage. Clearly separating these objectives, with dedicated budgets and audiences for each, makes results easier to read and simplifies the gradual optimisation of every campaign running at once.