Cybersecurity incident response is the process of identifying, responding to, and managing security incidents that have occurred or are occurring within an organization's systems or networks. It involves the use of tools, processes, and procedures to detect and investigate incidents, to assess the impact and severity of the incident, and to take appropriate action to contain and mitigate the incident. 

Cybersecurity incident response typically involves the following steps: 

1. Detection: Identifying the presence of a security incident, such as through the use of security monitoring and detection tools. 
2. Analysis: Analyzing the incident to determine its nature, scope, and impact. 
3. Containment: Taking action to contain the incident and prevent it from spreading further. 
4. Eradication: Removing the cause of the incident and repairing any damage that has been done. 
5. Recovery: Restoring the system or network to normal operation and taking steps to prevent future incidents from occurring. 

Cybersecurity incident response is an important part of a comprehensive security strategy, as it can help organizations to respond to security incidents effectively and efficiently and to minimize the impact and damage that they can cause.