Each event has an Embeds page with all of its public links and iframe snippets: registration, invite, directory, speakers, traffic map and the Today page.
Admin → Embed codes repeats this centrally: pick an event from the list to open its embed page, and grab the site-wide listings — business shows only, networking events only, or all events with a viewer-side filter.
Embed styling (colours and fonts) is set in Admin → Embed style.