Inline embed. The full calendar renders directly inside the page, best when scheduling is the main thing that page is for, like a dedicated booking page.
Popup widget. A floating button sits on the page, and clicking it opens the Calendly calendar in a popup overlay, a lighter touch for a page where booking is useful but not the primary action.
Popup text link. The lightest option: a plain text link opens the same popup overlay, useful inside body copy or an email where a full button would feel heavy.
QR code. Generated straight from an event type or scheduling link, this gets printed on a business card, a flyer, or in-person signage, so someone can scan straight to a booking page without typing anything.