Sentry's new Ruby SDK provides visibility into performance monitoring for Ruby applications, allowing developers to understand the context between backend and frontend issues. The SDK collects data on traces, logs, and key metrics, enabling distributed tracing that informs users about the environment and deploy that caused an error. With integrations with popular frameworks like Rails and Rack Middleware, as well as developer tools like Jira and GitHub, Sentry's Ruby SDK simplifies performance monitoring for modernizing Ruby applications. To get started, developers can use the default integration with Rack or manually configure the capture helpers. By instrumenting their code, developers can take advantage of Sentry's performance monitoring capabilities to improve their Ruby application.