Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Google Publisher Tag (GPT) is an ad tagging library for Google Ad Manager which is used to dynamically build ad requests.
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.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
PushPushGo is a GDPR-ready platform which enables startups, SMBs and corporations to create and send automatic web push notification campaigns on desktop and via mobile to manage various scenarios including abandoned carts, segmentation, cross-selling, customer engagement, and return rates.
Varnish is a reverse caching proxy.