Fazley RabbiFacebook and Instagram ads can reach people in four main ways. A broad audience sets only basic limits such as location, age and gender, and lets Meta find likely buyers. An interest audience targets people Meta links to certain topics. A custom audience reaches people who already know you. A lookalike audience finds new people who resemble an existing group, such as past buyers. Most small businesses do best with a mix: custom audiences to follow up with warm people, and broad or lookalike audiences to find new ones.
Broad audiences: let the ad do the targeting
With a broad audience you set where you deliver, perhaps an age range, and stop there. It sounds careless, but it fits how the auction works. Meta already estimates how likely each person is to respond, so a clear ad and the right objective become the real targeting.
For example, a pharmacy in Bogura that delivers only within the town might set the location to its delivery area and leave interests empty. An ad showing familiar products, the delivery promise and a WhatsApp number lets Meta learn, from who responds, who the right people are.
Good for: finding new buyers once your creative is strong and Meta can see results. Weak when: your tracking is broken or your ad is vague, because Meta then has little to learn from.
Interest audiences: a starting hint
Interest targeting, often called detailed targeting, uses topics Meta links to people based on things like the pages they follow and the content they engage with. A home bakery in Sylhet might start with people interested in cakes, baking and celebrations.
Keep two things in mind. Interests are estimates, not facts about a person. And Meta has removed or changed some options over time; depending on the objective and settings, it may also show your ad beyond the interests you picked if it expects better results. Check the audience settings in your ad set rather than assuming.
Good for: new pages with little data, or testing which themes attract buyers. Weak when: you stack many interests and filters until the audience becomes tiny and expensive.
Custom audiences: people who already know you
Custom audiences are built from your own sources:
- Website visitors, recorded through the Meta Pixel or the Conversions API.
- People who engaged with your Facebook page, Instagram account, videos or lead forms.
- Customer lists, such as phone numbers or email addresses of past buyers.
They are ideal for reminders and follow-ups, such as showing a new collection to people who bought before. They are just as useful for exclusions, such as hiding a first-order discount from existing customers. For the follow-up side, see bringing back visitors who looked but did not buy.
A word of care: only upload customer information you collected for a clear purpose, follow Meta's terms for customer lists, and respect the privacy rules that apply to you. If you are unsure what you may do with customer data, ask a lawyer.
Lookalike audiences: more people like your best customers
A lookalike audience starts from a source, usually a custom audience, and asks Meta to find new people who share similar traits. The quality of the source decides the quality of the result. A list of people who actually bought and did not return the parcel is a far better source than everyone who once liked a post.
For example, an online saree shop might build a lookalike from customers who ordered more than once, then test it against a broad audience using the same ad.
The four side by side
| Audience | Who it reaches | Best use | Watch out for |
|---|---|---|---|
| Broad | anyone inside your basic limits | finding new buyers at scale | needs strong creative and working tracking |
| Interest | people linked to chosen topics | new accounts, testing themes | estimates only; easy to make too narrow |
| Custom | people who already know you | follow-ups, repeat offers, exclusions | small size; privacy duties |
| Lookalike | new people similar to a source | growing from real buyers | a weak source gives weak results |
Mistakes to avoid
- Over-narrowing. Location plus age plus three interests plus a behaviour leaves Meta few people to choose from, which tends to raise costs. How the Meta ads auction works explains why.
- Advertising where you can't deliver. Match the location to where your courier actually reaches, especially with cash on delivery.
- Forgetting exclusions. Showing "first order discount" to last week's buyers wastes money and annoys them.
- Judging too soon. Test each audience with the same ad, and give it enough time before you decide.
A simple starting setup
- One campaign for new people, using a broad or lookalike audience, limited to your delivery area.
- One campaign for warm people: website visitors, recent engagers and past buyers, with a different message.
- Exclusions in place, so each group sees the message meant for it.
- Tracking checked, so Meta can see which people turn into orders; see Meta Pixel and the Conversions API.
If you want a second opinion on your audience setup, you can get in touch.