Express is a web application framework for Node.js, released as free and open-source software under the MIT License. It is designed for building web applications and APIs.

Node.js is an open-source, cross-platform, JavaScript runtime environment that executes JavaScript code outside a web browser.

Google Cloud Trace is a distributed tracing system that collects latency data from applications and displays it in the Google Cloud Console.

Google Cloud is a suite of cloud computing services.

Cloud CDN uses Google's global edge network to serve content closer to users.

YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.

Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.