Sentry features are used to detect overloading, bad deployments, dependency issues, security vulnerabilities, and performance regressions. Uptime monitoring alerts developers when an endpoint is not responding, while tracing shows the call stack where errors occur. Sentry's nodeProfilingIntegration helps identify performance bottlenecks. Overloading occurs when a task is too resource-intensive for the server's hardware, causing downtime. Uptime monitoring alone may not detect security vulnerabilities, and additional tools like Sentry are needed to identify these issues. Malicious entities can cause DDoS attacks or SQL injection vulnerabilities that can bring down an application. Sentry website monitoring provides early warnings of downtime, helping developers recover quickly and reducing the impact of outages.