PHP is a general-purpose server-side scripting language originally designed for web development to produce dynamic web pages. wikipedia.org

MySQL is a relational database management system (RDBMS) that runs as a server providing multi-user access to a number of databases. wikipedia.org

Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation (that is, the look and formatting) of a document written in a markup language. wikipedia.org

JavaScript is a prototype-based scripting language that is dynamic, weakly typed and has first-class functions. It is a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles. wikipedia.org

A landing page, sometimes known as a "lead capture page" or a "lander", is a single web page that appears in response to clicking on a search engine optimized search result or an online advertisement. wikipedia.org

WooCommerce is an open source e-commerce plugin for WordPress that was launched on September 27, 2011. wikipedia.org

WordPress is a free and open source blogging tool and content management system (CMS) powered by PHP and MySQL. It has many features including a plug-in architecture and a template system. wikipedia.org

CodeIgniter is an open source web application framework for use in building dynamic web sites with PHP. wikipedia.org

Search engine optimization (SEO) is the process of improving the visibility of a website or a web page in search engines via the "natural" or un-paid ("organic" or "algorithmic") search results. wikipedia.org

Web development is a broad term for the work involved in developing a web site for the Internet (World Wide Web) or an intranet (a private network).

Web design is the process of planning and creating a website. Text, images, digital media and interactive elements are used by web designers to produce the page seen on the web browser. wikipedia.org