Type its address, see its pages, and look at any of them copied — exactly as they will look here. Nothing is saved until you sign up.
Every page is copied as it looks — its own layout, fonts, colours and pictures — and becomes a page on your new website made of parts you can edit like any other: every heading, line, picture and button its own part, and the menu linking the copied pages. Have a look first; nothing is saved until you sign up.