> ## Documentation Index > Fetch the complete documentation index at: https://docs.appsignal.com/llms.txt > Use this file to discover all available pages before exploring further. # Features > Track errors and performance, search logs, chart custom metrics, and monitor your hosts, uptime, and processes with AppSignal. AppSignal monitors your application across errors, performance, logs, metrics, and the hosts and processes it runs on. Choose a feature to learn what it does and how to set it up. ## Application health Capture exceptions, group them into issues, and debug them with full trace context. Trace requests, jobs, and scripts to find where they spend time and slow down. Trigger notifications when a metric goes over or under a threshold you set. Choose the right alerting system and route alerts to the right people, without the noise. ## Logs & metrics Store, view, and query your application's logs, and extract metrics from them. Track custom metrics and build dashboards that relate them to errors and response times. ## Infrastructure Correlate CPU, memory, disk, and network metrics with your errors and performance. Check your endpoints from regions worldwide and get alerted when they can't be reached. Monitor cron jobs and background processes, and get alerted when they don't run as scheduled. ## Application customization Configure namespaces, metadata, data filtering, markers, limits, and notifications for your apps.