How do I add a custom property to my Klaviyo account?

If you are a business owner or marketer using Klaviyo, you may want to add a custom property to your Klaviyo account in order to better segment and target your customers. By adding a custom property, you can create more personalized and relevant campaigns that will help you increase engagement and conversions. Additionally, custom properties can be used to track customer behavior and preferences, allowing you to gain valuable insights into your customer base.