Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
LiteSpeed Cache is an all-in-one site acceleration plugin for WordPress.
LiteSpeed is a high-scalability web server.
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.
PHP is a general-purpose scripting language used for web development.