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How Facebook's Ad Targeting Really Works — and How to Use It Properly

6 min readRoberto Dal Corso · Published 2 Apr 2026

Most businesses run Facebook ads to the wrong audience and then blame the platform when results disappoint. Understanding how Facebook's targeting actually works unlocks a fundamentally different — and far more effective — approach to reaching your ideal prospects.

It Is Not Just Demographics

Targeting by age, gender, and location is the most basic use of Facebook's advertising system. The platform knows far more about its users than these broad attributes — and that knowledge is available to any advertiser willing to use it properly.

Interest and Behaviour Targeting

Facebook builds detailed profiles based on what users interact with, share, click, and watch. Interest targeting lets you reach people who actively engage with content related to your market. Behaviour targeting lets you reach people based on purchase activity, device use, and other observable patterns. Used well, these layers allow you to define an audience that closely matches your ideal client.

Custom and Lookalike Audiences

Your most powerful audience is not cold traffic — it is warm audiences built from people you already know. Upload your customer list to create a custom audience. Ask Facebook to build a lookalike audience of people with similar characteristics to your best customers. Retarget website visitors who have already shown interest. These consistently outperform cold demographic targeting by a significant margin.

Who this is for

Is this guide relevant to your situation?

  • Business owners running Facebook ads with disappointing results
  • Marketing teams using only age, gender, and location to define audiences
  • Owners who want to reduce their cost per lead from Facebook advertising
  • B2B and B2C businesses wanting to reach more of the right people with their ad spend
How we help with this

EMS coaching helps business owners understand where their marketing and advertising investment is working and where it is wasted — so every pound or franc spent on paid channels goes further.

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