We work as a managed security services provider (MSSP). We have different clients who have their own security team.
One company that I worked for recently had a security team of three people, then they hired us for 24/7 analysis and monitoring. For that, I solely worked on building this product, then there are the eight to nine people who do 24/7 monitoring and analysis.
Sentinel is a full-fledged SIEM and SOAR solution. It is made to enhance your security posture and entirely centered around enhancing security. Every feature that is built into Azure Sentinel is for enhancing security posture.