According to the studies, the average human attention span has dropped from 12 seconds to 7 seconds from 2006 to 2016.
This means, that as a website owner you have very little time to show users your content and convince them to stay on your website.
The users will potentially leave your website if it loads slowly or even before it loads!!!
According to a StrangeLoop case study that involved Amazon, Google, and other larger sites, a 1 second delay in page load time can lead to 7% loss in conversions, 11% fewer page views, and 16% decrease in customer satisfaction.
On top of that, Google and other search engines have already started penalizing slower websites by pushing them down in the search results which means lower traffic for slow websites.
To get more traffic, subscribers, and conversion from your website, you must make your WordPress website really FAST!