For displaying featured products with WooCommere the
[products visibility="featured"] or
[featured_products] shortcodes can be used. If your WooCommerce version is lower than 3.2 then you should use the latter.
The appearance of the displayed products depends on your active theme, the following examples are using Chap theme, but the shortcodes work with any theme as long as you’re using WooCommerce.
[featured_products columns="3" per_page="3" /]