FAB

Use FAB for the single most important action on the page. Place at the bottom-right corner of the viewport

Don't use FAB when the action isn't the most important on the page — use a regular Button instead

Use options for speed dial when multiple related actions share the same trigger

Don't use FAB for destructive actions (delete / clear). Don't use multiple FABs on the same page

When options are provided, the FAB becomes a speed dial — clicking it toggles an action list above the button

Don't use multiple FABs on the same page