Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
Google Sign-In is a secure authentication system that reduces the burden of login for users, by enabling them to sign in with their Google account.
JivoChat is a live chat solution for websites offering customizable web and mobile chat widgets.
PHP is a general-purpose scripting language used for web development.