ACF Relationship and post object fields are great when you want to create relationships between various posts. You can make many-to-many, one-to-many and one-to-one relationships. Update the fields automatically using the ACF Post-2-Post plugin.
We use the Relationship and Post Object fields extensively on this website. The section at the bottom of the page is rendered using Post Object with Template. The “Part of” in the page header is rendered using a post object dynamic tag.