floating button, fab, primary button, primary action, main button
The floating action button is used either for primary action on the page or additional action. Another function of FBA is to turn one UI element to another or to reveal more options.
It appears onto the highest layer of the interface, in front of all other elements, and follows the user’s scrolls, remaining over his or her eyes. It is traditionally small-sized and round-shaped.
«don't really float my boat»
And because of the bold visual style of Material Design, FABs are strikingly hard to ignore and stand out — and herein lies the problem. While FABs seem to provide good UX in ideal conditions, in actual practice, widespread adoption of FABs might be detrimental to the overall UX of the app.
Stand in the way
Interrupts full immersion
Located above the content
Less immersive UX
Badly affecting apps (or screens)
Blocks other elements
So much of Material Design was driven by the idea of making our UIs easier to navigate for users. I think the FAB has endured because it's a statement of hope in software—an embodiment of a philosophy. With this in mind, I felt it appropriate to reduce the information and actions down to the bare essentials allowing the users to easily navigate, understand and act upon this ‘Nudge’. This statement also resonated with meeting the users where they want to be