Question

If I am creating a custom audience for Instagram account and Facebook page users does that list automatically update if I’ve done it let’s say over the course of 180 days also that would be the same thing for the look-alike audience I am not using any sort of pixel. I just wanna find out if it would automatically update.

Answer 1

Yes! If you're creating a custom audience based on your Instagram account or Facebook Page engagement, Meta automatically refreshes it every day—as long as the audience is based on a rolling time window like “past 180 days.”

Here’s how it works:

Custom Audiences (Page/IG Engagement)

• When you build a custom audience using:

  • Facebook Page > people who engaged with your page or content

  • Instagram Account > people who visited profile, liked, commented, saved, etc.

• Meta updates that list daily, adding new people who engage and removing those who fall outside the 180-day window.

So you don’t need to recreate or manually refresh that audience every week or month—it stays dynamic.

What About Lookalike Audiences?

• Your Lookalike Audience (LAL) is created from the seed custom audience.

• While the lookalike audience itself doesn’t technically update in real time, Meta re-calculates it periodically as your source audience changes.

• You don’t need to re-create the lookalike unless you want to test different percentages (e.g., 1%, 3%, etc.).

No Pixel? No Problem (for this case)

Since you're not using the Pixel and are relying on Page/IG engagement only—that's totally fine for brand interaction audiences. Just know that without the pixel, you can’t build audiences based on site behavior like "add to cart" or "purchase."

Tip:

• Yes, your 180-day Facebook and Instagram custom audiences automatically update daily.

• Your lookalike audience refreshes over time too—no need to manually recreate unless you want to experiment.

• Just make sure your accounts are linked properly in Business Manager for full tracking.

You're good to go!