SIEM, or Security Information and Event Management, is a platform that collects log data from all the systems and tools in your environment and pulls it into one place. It then looks for patterns that might point to an attack, giving security teams a single view across the whole network.
A SIEM also helps with compliance because it keeps a record of what happened and when. The catch is that a SIEM can generate a huge amount of noise. Without a team to sort real alerts from false ones, it is easy to get overwhelmed, which is why many businesses use an MDR service to run it for them.
