Magento provides three redirect functions for front-end controller.

They are:

1. _redirect()
2. _redirectUrl()
3. _redirectReferer()

Now, let’s talk about them.

The first function is _redirect($path)
This function used for internal redirection.

The second function is _redirectUrl($path)
This function used for external redirection.

Third function is _redirectReferer()
This function used to redirect to the referral url.

As you can see, all functions has different roles to play. Thus, use them very wisely. Happy coding!