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WordPress is an open source blog publishing and content management system, based on PHP and MySQL.

PHP is a scripting language for creating websites.

JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

Underscore is a JavaScript library that provides functional programming support.

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the visitors browser.

Lodash is a JavaScript utility library delivering modularity.

Backbone is a JavaScript library providing a framework for defining models in applications.

React is an open source JavaScript library for building user interfaces, developed by Facebook.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Moment.js is a library to manipulate dates in JavaScript.

GSAP (GreenSock Animation Platform) is a JavaScript library for HTML5 animations.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Cloudflare Server is a web server developed by Cloudflare.

Linux is a Unix-like open source operating system originally developed by Linus Torvalds.

WP Engine provides managed WordPress hosting.

Akamai is a content delivery network. This includes the former brand Instart Logic.

Cloudflare provides a content delivery network.

DigiCert is an SSL certificate authority. This includes Verizon, whose Enterprise SSL Business has been acquired by DigiCert.

IdenTrust is a SSL certificate authority.

Sectigo (formerly Comodo CA) is a US-based SSL certificate authority.

The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare.

jsDelivr is a service for hosting JavaScript files.

The jQuery CDN hosts copies of the jQuery library, provided by MaxCDN.

Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google. This includes the Ads conversion tracking and the Floodlight services.

Facebook Pixel is an analytics tool to track actions on websites.

Twitter conversion tracking tracks the actions of website visitors coming from Twitter ads.

Siteimprove is a web governance software, that includes a web analytics module.

The LinkedIn Insight Tag helps to optimize LinkedIn campaigns.

Quantcast provides visitor statistics of web sites.

CrazyEgg is a website visitor and click tracking service.

The Google Advertising network consists of AdSense, DoubleClick and other services.

The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.

Facebook Social Plugins provide a way for Facebook users to share web pages with their friends.

A Twitter Button allows a Twitter user to post a tweet from the visited site.

The Pinterest Pin-It button allows website visitors to pin images onto Pinterest.

LinkedIn Share Buttons enable visitors to to share website content with their LinkedIn network.

Reddit Buttons allow web pages to be submitted to and discussed on Reddit.

Tumblr buttons make it easy for Tumblr bloggers to share content on their blogs.

External Cascading Style Sheets define style rules in a separate CSS file.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Persistent cookies with an expiration time of up to 1 day.

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Secure cookies are used only via an encrypted connections, which may increase security.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

Brotli is a lossless compression algorithm developed by Google.

The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.

HTTP/2 is the second major version of the HTTP network protocol.

HTTP/3 is the third major version of the HTTP network protocol, derived from the QUIC protocol.

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

Twitter Cards enable automatic attachment of photos, videos and media elements to Tweets.

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.

Microdata is a specification to integrate metadata within existing content on web pages.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

Scalable Vector Graphics (SVG) is an XML-based vector image format.

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

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