Google PRINCIPLES OF MOBILE SITE DESIGN: DELIGHT USERS AND DRIVE CONVERSIONS - Manual (Page 23)

13. MAKE IT EASY TO
FINISH CONVERTING
ON ANOTHER DEVICE
Not all participants were comfortable converting
on their mobile device. Offer an easy way to save
or share information across devices to keep users
in your funnel. For instance, a career site allowed
participants to email themselves jobs to apply
for later.
Example from Macy’s Mobile Site.
23
Key Takeaway
Mobile visitors may be researching
to convert later, so offer a simple way
to resume their journey on another
device via social sharing, email or
save-to-cart functionality.