Amazon Advertising (formerly AMS or Amazon Marketing Services) is a service that works in a similar way to pay-per-click ads on Google.
Fastly is a cloud computing services provider. Fastly's cloud platform provides a content delivery network, Internet security services, load balancing, and video & streaming services.
Google Analytics is a free web analytics service that tracks and reports website traffic.
PHP is a general-purpose scripting language used for web development.
Quantcast Measure is an audience insights and analytics tool.