Widgets are the blocks on your page. Song cards, email signup, tour dates, merch, text, images, and layouts all get added the same way.
Add a widget
Open Page Editor.
Go to the Widgets list (on mobile, it's at the bottom).
Tap the + in the widget list, or the + in the top toolbar.
That opens Add New Widget. Search, or pick a category: Layouts, Content, Music, Video, Community, Events, Pre-save, Sell music, Embeds, Merch, Social, Custom Links, Contact.
Pick a widget. It drops onto the page and autosaves.
Remove, hide, or reorder
Reorder: drag the handle in the widget list, or drag the widget on the preview.
Hide: tap the eye icon. The widget stays on the page, fans just don't see it.
Duplicate or delete: use the row actions on that widget.
Highlight pages don't have an add-widget catalog. Those pages are built around one song.