[Plugin: WooCommerce – excelling eCommerce] Setting up with homemade theme

First-timer potentially stupid question: on the “declare WooCommerce support” linked guide, it mentions woocommerce_content() and hooks.

Is it a case of EITHER use woocommerce_content() OR use hooks, or can/should both be used?

Thanks in advance.

https://wordpress.org/plugins/woocommerce/