cdnjs is a free distributed JS library delivery service.
The chat button by GetButton takes website visitor directly to the messaging app such as Facebook Messenger or WhatsApp and allows them to initiate a conversation with you.
Google Analytics is a free web analytics service that tracks and reports website traffic.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Progressive Web Apps (PWAs) are web apps built and enhanced with modern APIs to deliver enhanced capabilities, reliability, and installability while reaching anyone, anywhere, on any device, all with a single codebase.