User expectations for software applications keep rising. Nowadays, services are expected to be highly reliable and perform well 24/7. Any kind of downtime is going to result in frustrated users and hurt your business long-term.
A key component in improving reliability is monitoring your application. While setting up basic monitoring is easy, having the ability to scale monitoring efficiently as traffic to your service grows is a major challenge. You also want visibility into every important metric for your service and the ability to make the data you are collecting useful and actionable with the ability to query and analyze it efficiently in real time on demand.