When you open App Selector, you'll see a list of categories, such as browser, email, or messaging app. From there, you can select which app you want to use as default for each category. This means that if you prefer using a certain browser or email client, you can set it as your default and use it every time you need to access the internet or check your email.
This feature is super handy because it lets you customize your phone experience to fit your needs and preferences. Whether you're a fan of Google Chrome or Mozilla Firefox, you can set it as your default browser and use it to surf the web.