Apache is a free and open-source cross-platform web server software.
Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Google Ads Conversion Tracking is a free tool that shows you what happens after a customer interacts with your ads.
PHP is a general-purpose scripting language used for web development.
Ubuntu is a free and open-source operating system on Linux for the enterprise server, desktop, cloud, and IoT.
YouTube is a video sharing service where users can create their own profile, upload videos, watch, like and comment on other videos.