Data is your best friend when it comes to evaluating your crowdfunding campaign. Thus, you should collect and analyze data from various sources, such as your crowdfunding platform, website, email list, and social media channels. When looking at key metrics, consider the number and amount of pledges, donations, or sales; the conversion rate of visitors to backers; the average pledge, donation, or sale amount; the retention rate of backers; the referral sources and traffic channels; the engagement and sentiment of your audience; and the feedback and testimonials of your backers. By analyzing this data, you can gain insight into what worked well and what didn't, what motivated and influenced your backers, and what challenges and opportunities you faced.