Ngrok is a popular tool which is used to share localhost to the internet. Mostly used by developers and freelancers to share development with clients without having the hassle of server setup for demos. Ngrok can also be used for services like site-to-site connectivity, API gateways, device gateways, Kubernetes operators, global load balancing, identity-aware proxies, webhook testing, and also as previously discussed for developer previews. By leveraging ngrok, users can streamline their workflow and enhance their operational efficiency.