You hate to wait
So Do your visitors! As your shop begins to load, the visitor has to wait for content to appear. Until the shop has loaded, the visitor is stuck in limbo and can do nothing except be annoyed, get angry or choose to drop your shop altogether. If your shop is fast the limbo is short and the user content - the best foundation for a sale.
Fix it now
The Internet is Fickle
Mobile browsing can be painful. Depending on connection quality and the state of your smart phone, the experience can and will differ a lot. With more than 70% of all searches world wide being from a smartphone - Google knows! As much as a bad mobile experience hurts your business, Google's business is hurt more!
Do something
Google cares only about Mobile
Instead of looking at the desktop version of your shop. Google now looks at the mobile version and is ranking it based on how fast it renders on a mobile phone. If your shop is slow, chances are you have already lost business because of it. Now you will loose your ranking in Google's SERPS as well.
Speed up my shop