Aruba.it is an Italian company mainly active in the web hosting and domain registration businesses.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
IPInfoDB is the API that returns the location of an IP address.
MaxMind is a provider of geolocation and online fraud detection tools.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.