Google Analytics is a free web analytics service that tracks and reports website traffic.
Google Publisher Tag (GPT) is an ad tagging library for Google Ad Manager which is used to dynamically build ad requests.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Taboola is a content discovery & native advertising platform for publishers and advertisers.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.