It is crucial for businesses to measure the ROI of their lead magnets because it helps them understand if their marketing efforts are making money or not. Lead magnets are things like free eBooks or discounts that businesses offer to get people interested in their products or services. By seeing how many new customers these lead magnets bring in, and how much money those customers spend, businesses can figure out if the lead magnets are worth the investment. For example, if a company spends $500 on creating a lead magnet but only gets $100 back from the customers it brings in, then that lead magnet isn't working well. They need to know this so they can change their marketing strategy and try something different to make more money. So, measuring the ROI of lead magnets helps businesses make smart decisions about where to focus their marketing budget and efforts to make sure they're getting the most out of their investments.