Não entendo isso: {{wp-favorite-posts}}

tl;dr : just paste it into your page/post.

Long answer:

Hi Patrique, this is must be used as a “shortcode”. That means that you paste it in the page or post body and that will render your favorites posts there.

In case you are new, a shortcode is usually between brackets, like: [short-code]. It is always a way to include special content from within posts/pages content edit box.

In this case in particular, I don’t know why the developer choosed to use the double curly brackets “{{ }}”.