The ...More tab allows you to add multiple People to the trip. This is also where you can find the code required to embed an itinerary on a website built outside of Travefy.
For large group trips, you can go to the ...More tab, select People, and travelers can be added here and tagged on events to create unique itineraries for each traveler.
Learn how to add people to a trip here.
To learn more about embedding an itinerary on your website, follow these instructions here.