Some of the content on this site uses custom post types instead of the standard Page or Post. Custom post types exist because this content has needs a standard Page can’t cleanly handle: structured, repeatable fields (a date, a location, a person’s title), specific tagging, and page layouts that update automatically as those fields change, rather than being hand-built block by block.
Each custom post type has its own field group(s) and taxonomies, and its own set of purpose-built blocks — grouped in the Block Inserter under a matching “Seventy ___” category (Seventy Events, Seventy People, and so on). These blocks aren’t general-purpose design tools; they’re utilities that pull information straight from a post’s fields and tags and display it automatically, so editors rarely need to touch them directly.