Incident response is like being a firefighter for your application. When something goes wrong, you need to figure out what's causing the problem, and fix it as fast as you can. Just like a firefighter rushes to a burning building to save the day, you rush to save your app from delivering a poor user experience.
Imagine you have a web application that suddenly starts giving errors to users. You need to quickly identify the root cause, whether it's a bug in the code, a server issue, or something else, and then work to resolve the problem. This might involve digging through log, monitoring system metrics or investigating traces to pinpoint the issue. Once you've identified the problem, you can then work on implementing a fix, whether that's deploying a patch or rolling back changes.