Ngrok is a popular development tool that enables developers to test web applications and webhooks by exposing a local server to the public internet. However, Ngrok has recently added restrictions to its service, which can cause issues with tutorials and instructions from online sources. The main limitations are session expiration times of 2 hours for anonymous users and the inability to serve HTML pages anonymously. To overcome these limitations, developers can create a free Ngrok account, which lifts the restrictions while still using the free tier of the service. By doing so, they can avoid hitting the limitations imposed by Ngrok's new measures.