mabl includes a "link crawler" plan and a corresponding journey to "visit all linked pages within the app" by default. The plan is configured to run against all of your application environments every week.
If you opted the include credentials to access your application when you added the application, the link crawler will use those credentials to automatically log in to your application each time it runs at test.
You can change the configuration of the default link crawler plan(s) as you would any other plan.
mabl visits all linked pages within the domain by default
With no configuration, mabl will visit all linked pages within your domain. That means that if you configure an environment with URL https://app.example.com, mabl will visit not only pages within https://app.example.com (such as https://app.example.com/page1) but also any other pages that are linked to example.com within your app. Often, this results in mabl crawling documentation sites (https://docs.example.com) and marketing sites (https://www.example.com).