The handoff feature was introduced at Apple World Wide Developer Conference back in June 2014. It allows iOS devices such as iPhone and iPad running iOS 8 to work seamlessly with a Mac running OS X Yosemite.
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For example, you can start writing an email on your phone and finish it off on your Mac. The same goes vice versa. This feature includes Mail, Safari, Pages, Keynote, Numbers... all of Apple apps frankly.
However, this feature is not automatically turned on. If you find yourself wondering why the heck it is not working. Here is how you do to turn this feature on.
For iOS devices, go to Setting --> General --> Handoff... --> Turn on Handoff
For Mac, go to Setting --> General --> Turn on Handoff (near the end)






