Facebook says my Klaviyo audience is too small, but my segment in Klaviyo shows 1,000's of customers are in it. What is going on?

  • 18 November 2022
  • 1 reply

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I’ve made a bunch of segments within Klaviyo and integrated them as custom audiences in Facebook. On Klaviyo, it shows there are over 5,000 people in the segment, but Facebook says it’s too small to be used for a lookalike audience. 


Best answer by David To 18 November 2022, 22:01

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Hello @Sav08,

Welcome to the Klaviyo Community!

If you haven’t already, I would checkout my colleague, @Jessie Sigler’s awesome resource on this topic. You can find a directory of all her Community posts pertaining to troubleshooting Facebook related issues in the post below:

I would especially recommend looking at the following post:

So, although you may have a segment of over 5,000 contacts in Klaviyo, if your Facebook Ads List contains fewer than 20 people, Facebook will not allow you to advertise to a custom audience. Hence, the error message you’re receiving. 

I hope this helps!