GDPR is all about data privacy. There are a number of drivers for privacy, of which the GDPR is just one. You need to get this right to protect your reputation with key stakeholders (eg press, consumers, customers, suppliers, vendors), and doing that can lead to new business opportunities for you.
But it’s not easy. There are some challenges. Data is growing, it’s mobile, it’s stored in places you might not know about (the cloud) and also no-one owns it in your organisations. In parallel, data is valuable so at risk of theft by people both within and outside your organisation. Symantec's ISTR research shows that 49% of data breaches are as a result of an external threat. So you need to look holistically at the issue.