Craft CMS is a content management system for building bespoke websites.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Open Graph is a protocol that is used to integrate any web page into the social graph.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
SEOmatic facilitates modern SEO best practices & implementation for Craft CMS 3.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.