How often should we update our custom audiences to ensure relevance?

 it's important to regularly update them. The frequency with which you should update your custom audiences will depend on several factors, such as the size of your audience, the rate at which customer data changes, and the relevance of your ad campaigns.

Here are some guidelines for how often you should update your custom audiences:

1. Daily or weekly: If you have a large customer base or if your customer data changes frequently, you may want to update your custom audiences daily or weekly. This will help ensure that your custom audiences are accurate and up-to-date, and that you're targeting the right people with your ad campaigns.
2. Monthly: If your customer base is smaller or if your customer data changes less frequently, you may be able to update your custom audiences monthly. This can be a good balance between keeping your custom audiences up-to-date and minimizing the time and resources required to update them.
3. Quarterly or annually: If your customer data changes slowly or if you have a stable customer base, you may be able to update your custom audiences quarterly or annually. However, it's still important to regularly review and update your custom audiences to ensure that they remain relevant and effective.

In addition to regularly updating your custom audiences, it's also important to regularly review and optimize your ad campaigns to ensure that they're performing well and reaching the right people. By regularly updating your custom audiences and optimizing your ad campaigns, you can improve your advertising performance and maximize your return on investment.