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

If you are a business owner or marketer using Klaviyo, you may want to add a custom field to your Klaviyo account in order to better segment and target your customers. By adding a custom field, you can create more personalized and relevant campaigns that will help you increase engagement and conversions. Additionally, custom fields can help you gain valuable insights into your customers' behavior and preferences, allowing you to make more informed decisions about your marketing strategy.