Three second rule: 57 percent of online shoppers will wait three seconds or less before abandoning a site. Website page speed is crucial.
Ideally, websites load within three seconds, or two seconds if it’s an eCommerce site. The two-to-three second mark is the turning point where bounce rates skyrocket. Some 40% of consumers will wait no more than three seconds before abandoning a site. if a website funnel isn’t converting, or it breaks down somewhere (leaks) in the middle, a website designer needs to figure out where the Google Analytics metrics drop off.
Online Marketing Juice 