Data loss prevention (DLP) and security information event management (SIEM) are not one size fits all (despite being sold as such) The central issue is a misunderstanding of what SIEM and DLP truly are: a process, not a product. Security teams deploying DLP and SIEM solutions must understand their environment and what data is important to your company. DLP works well if you know what information is critical to your organization, but if you don’t, your DLP efforts will likely fail.”]
Source: https://www.darkreading.com/analytics/the-truth-about-dlp-siem-it-s-a-process-not-a-product