You’re optimizing a client’s Shopping campaign to drive online sales and are assessing the company’s website. You determine that the site needs to be improved for mobile, and recommend that the company:
increase the page load speed to 9 seconds or longer
add more menu options so people can see all products offered
make all data fields required at checkout
allow people to return to their shopping cart on their desktop computer
When creating a mobile website use strategies that make the most of the size of mobile screens and how people use their phones. Allow people to pick up again on desktop. Make it easy for people to come back to their shopping cart when they’re on their desktop computer, so they can finish their purchase.
Read more here: https://support.google.com/partners/answer/2549057