A hard bounce is an e-mail message that has been returned to the sender because the recipient's address is invalid. A hard bounce might occur because the domain name doesn't exist or because the recipient is unknown.

A word or unspaced phrase prefixed with the # symbol. Commonly used on social networking sites such as Twitter, Google+ and Instagram. Appending a hashtag to a post both helps to give that message context and groups it with other messages about that same topic or event.

The process of developing multiple title variations for an article or piece of online media to determine which one performs the best.

A graphical representation of data such as clicks and scrolls that uses a system of color-coding to represent different values.

An oversized image or video at the top of a website, often extending full-width and featuing a CTA and/or value proposition.

Also referred to a “hex” numbers, they are a base-16 numbering system used to define colors online. Hex numbers include the numerals 0-9 and letters A-F. Hexadecimal numbers are written in three sets of hex pairs. Because screen colours are Red, Green and Blue the first pair defines the Red hue, the second pair defines the Green hue, and the third pair defines the Blue.

Contrary to popular belief, a hit does not represent a single visitor to a website. A hit is actually a request for a single file from your web server. This means one page can actually generate multiple hits, as each page generally has more than one file, for example a HTML or other base file, a CSS file, multiple images and so on. Each request for each file is one hit, so a web page with 50 images on would register 50 hits. Many years ago, hits were quoted as the main traffic metric, to amplify sites into sounding like they were receiving more traffic than they actually were.

Honeypot is a computer security mechanism set to detect and deflect counteract attempts at unauthorized use of information systems.

A social media management platform that allows users and brand managers to update, post, schedule and respond via multiple social media platforms, including; for Facebook, Twitter, LinkedIn, Google+, and WordPress. Hootsuite operates on a freemium model with products built for casual and enterprise users.

Software that serves a wide range of customers across multiple industries and sectors, focusing on broad functionalities that are applicable across business types.

The .htaccess file is the default directory-level configuration file on Apache web servers. It is also known as a “distributed configuration file.” Configuration directives contained in the .htaccess file apply to the directory in which the file is placed as well as all of its subdirectories. Within the .htaccess file, settings such as authorisation and authentication, rewriting of URLs, cache control, and customised error responses can all be specified.

(Hypertext Markup Language) — The dominant formatting language used on the World Wide Web to publish text, images, and other elements. Invented by Tim Berners Lee in the early 1990s, HTML uses pairs of opening and closing tags (also known as elements), such as ; each pair assigns meaning to the text that appears between them. HTML can be considered code, but it is not a programming language; it’s a markup language, which is a separate beast. The latest standard of HTML is HTML5, which adds powerful interactive functionality.

HTML email is an email that is formatted like a web page, using colors, graphics, table columns and links.

Also referred to as an HTML element, an HTML tag is the bit of code that describes how that Also referred to as an HTML element, an HTML tag is the bit of code that describes how that particular piece of the web page it is on is formatted. Typical tags specify things like headings, particular piece of the web page it is on is formatted. Typical tags specify things like headings, paragraphs, links, and a variety of other items.

The upcoming, powerful standard of Hypertext Markup Language, which has added advanced interactive features, such as allowing video to be embedded on a web page. It is gaining in popularity compared to proprietary standards, like Adobe Flash, because it is an open standard and does not require third-party plugins. Using HTML5 will allow web pages to work more like desktop applications. The latest releases of most browsers support HTML5 to varying degrees. HTML5 does not cover CSS and JavaScript, but often when people refer to HTML5, they often are using it as a blanket term, applying not only to changes to the HTML but also to changes in CSS and JavaScript.

Stands for HyperText Transfer Protocol. HTTP is a set of rules for transferring hypertext requests between a web browser and a web server.

Similar to HTTP, HTTPS stands for HyperText Transfer Protocol over SSL (Secure Socket Layer) or, alternately, HyperText Transfer Protocol Secure. Like HTTP, it is a set of rules for transferring hypertext requests between browsers and servers, but this time it is done over a secure encrypted connection.

A cloud computing environment that uses a mix of on-premises, private cloud, and third-party, public cloud services with orchestration between the platforms.

A hyperlink is a link from one web page to another, either on the same site or another one. Generally, these are text or images, and are highlighted in some way; text is often underlined or put in a different color or font weight. The inclusion of hyperlinks creates the “hyper” part of “hypertext.”

Hypertext is any computer-based text that includes hyperlinks. Hypertext can also include presentation devices like tables or images, in addition to plain text and links.