Not pre-connecting to external resources can result in “Preconnect to required origins” warnings in Google Page Speed Insights.
A “Preconnect” is a way of informing the browser that your page intends to establish a connection to another resource. This can improve page load time by enabling the browser to establish early connections to important third-party resources.
Common Fixes
Add a preconnect tag to any third-party links ( rel=”preconnect” ).