
According to Google, as a mobile web page’s load time reaches 10 seconds, the probability of its visitors bouncing (i.e., leaving the site) increases by 123%. It turns out, it’s usually not their WiFi connection’s fault.
That’s the domain of a web developer. A good one can write code, develop and test new apps and websites, iterate on features, monitor site traffic, ensure the website isn't bogged down with elements, and, above all else, solve problems people don’t even know they had.