Why is my Hotjar heat-map tracking code slowing down my site’s mobile load speed?

Hotjar impacts mobile page speeds when its heavy tracking scripts block the browser’s main execution thread, which can be mitigated by deferring script load times or pausing redundant tracking.

“This one’s straightforward, Hotjar’s script is blocking your page’s main thread on mobile. I’ll defer the load properly and have your speed back within 24 hours for $99.”
— Jeff Bollettino, Managing Director, Ignite Conversions