What types of custom audiences can you create?
Website and app audiences update automatically. Customer lists need to be re-uploaded manually (or synced via API) to stay current.
Custom audiences in plain English
Think of it like fishing in a stocked pond versus the open ocean. Broad targeting throws your ad into the ocean and hopes the right fish swim by. Custom audiences put your ad in front of a pond full of fish that have already nibbled your bait. They visited your site. They watched your video. They gave you their email. They already know who you are, so your ad doesn’t start from zero. That’s why custom audiences typically have 2-5x higher conversion rates than cold prospecting audiences. The people in them have already taken a step toward your business.What are common custom audience mistakes?
Audience is too small
Audience is too small
Meta needs at least 1,000 people in a custom audience to deliver ads effectively. Below that, the algorithm can’t optimize and your CPM will spike. If your website audience is under 1,000, use engagement audiences (video viewers, page followers) to supplement. These build faster because they don’t require a website visit.
Not refreshing or updating customer lists
Not refreshing or updating customer lists
A customer list uploaded six months ago is stale. People change emails, unsubscribe, or become irrelevant. Re-upload your list at least monthly. For e-commerce, segment by recency: customers from the last 30 days are very different from customers from 180+ days ago.
Targeting all website visitors instead of segmenting
Targeting all website visitors instead of segmenting
An audience of “everyone who visited my site in the last 180 days” is too broad and too cold. Someone who visited your homepage once 5 months ago is very different from someone who viewed 3 product pages yesterday. Segment by recency (last 7, 30, 60 days) and by behavior (product viewers, cart adders, blog readers). Shorter windows and more specific actions produce better results.
Not excluding recent converters
Not excluding recent converters
If someone just bought from you, showing them the same purchase ad is a waste of budget (and annoying). Create an exclusion audience of people who converted in the last 7-14 days. This keeps your retargeting budget focused on people who haven’t bought yet.
How custom audiences relate to other concepts
How to set up a custom audience in Meta Ads Manager
1
Go to Audiences
In Meta Ads Manager, click the hamburger menu (three lines) and select Audiences under the “Engage” column. Or go directly to business.facebook.com/adsmanager/audiences.
2
Click Create Audience and select Custom Audience
You’ll see the source options: Website, Customer list, App activity, Catalog, and Engagement (video, Lead form, Instagram account, Facebook Page, Events, etc.).
3
Choose your source and configure
For website audiences: select your Pixel, choose the event (All visitors, ViewContent, AddToCart, etc.), and set the retention window (1-180 days). For customer lists: upload a CSV with emails, phone numbers, or other identifiers. For engagement: pick the type and timeframe (e.g., “people who watched 50% of any video in the last 30 days”).
4
Name your audience clearly
Use a naming convention that includes the source, segment, and window. Example: “WV - Product Viewers - 30d” or “CL - Buyers Last 90d”. Clear names save you hours when you have 20+ audiences.
5
Use the audience in a campaign
When creating an ad set, go to the Audience section and select your custom audience under “Custom Audiences.” You can also use it as an exclusion to prevent certain people from seeing your ads.
Track how your custom audiences perform
AdAdvisor connects to your Meta ad account and shows you ROAS, CPA, CTR, and other metrics across all your campaigns and audiences. See which custom audiences are driving real returns and which ones need refreshing.Try AdAdvisor Free
Connect your Meta ad account and see performance across all your audiences.
Connect Meta Ads
Step-by-step guide to linking your Meta ad account to AdAdvisor.
Related terms
Lookalike Audiences
Find new people who resemble your best customers
Retargeting
Show ads to people who already interacted with your business
Meta Pixel
The tracking code that builds your website audiences