Apache is a free and open-source cross-platform web server software.
DoubleClick for Publishers (DFP) is a hosted ad serving platform that streamlines your ad management.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
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.
PayPal is an online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.
Unpkg is a content delivery network for everything on npm.