Security in sign-up forms is paramount for several reasons: 1. Data Protection: Users expect their personal information to be handled with care. Insecure forms can lead to data breaches, compromising user privacy. 2. Compliance: Regulatory bodies such as the GDPR and CAN-SPAM Act have stringent requirements for data protection. Non-compliance can result in hefty fines. 3. Trust: Secure forms help build trust between the business and its audience. If users feel their data is safe, they are more likely to engage and convert.