What Is a Custom Audience? Built From Data You Already Have
DICTIONARY · META ADS

What Is a Custom Audience?

A custom audience is an audience created from customer or behavioural data.

In plain English

Sources include uploaded customer lists, website activity, app activity and engagement with your Meta assets. It is your own data rather than the platform's inference.

Match rates matter. Uploading email addresses alone produces a lower match than including phone numbers and names, and a low match means a smaller usable audience.

What to know

From your own data
Lists, site activity, engagement.
Higher performing
Than inferred interest segments.
Match rate varies
More fields uploaded, better matching.
Foundation for lookalikes
Which are modelled on them.

Why it matters

An uploaded customer list is usually the best-performing audience an account has, and the seed for the best lookalike. Most small advertisers never upload one.

Common mistakes

×Never uploading customer data.
×Uploading email only, lowering match rate.
×No exclusion of existing customers where they will not buy again.
×Audiences too small to deliver.

FAQs

What should I upload?

Email, phone and name where you have them. More fields raise the match rate.

Is uploading customer data permitted?

With appropriate consent and a lawful basis, yes. Check your privacy notice covers it.

WRITTEN BY TARIQ SALLAM
Marketing Consultant. Entrepreneur. Content Creator.

I'm a marketing consultant, entrepreneur and content creator. I help businesses grow through practical marketing, websites, SEO, content and AI.

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