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An H1 tag is an HTML (Hypertext Markup Language) element used to identify the title of a webpage in the code. It is the most prominent headline on a webpage and is usually larger than other text, making it stand out more than the other headlines on the page.

Habitual decision making is a process of making decisions based on previous experience and behaviour. It is a process which is used by many consumers and is an important part of the decision-making process.

The ‘Halo effect’ is a term that is used extensively in marketing and consumer behaviour. It refers to the phenomenon where a consumer’s overall opinion of a brand is heightened due to their positive experience of a single product or service.

Hard bounce is an email error relating to the delivery of an email message. It occurs when an email server, either the sender’s or recipient’s, refuses to accept the email because the recipient’s address does not exist.

Hard sell is a term that is commonly used in marketing and often used to describe aggressive forms of sales tactics. It is a form of persuasion designed to influence a person to make an immediate buying decision by using various techniques such as pushing a particular product, discounting a product or service, pushing the customer to purchase the product or services or making exaggerated claims or statements.

HARO, which stands for Help a Reporter Out, is a service that connects journalists to sources that they can use when writing an article, podcast, or even book. It works by allowing the journalist to post a request for certain types of information, and sources can respond and offer the information.

A Hashtag (or 'hash tag', to give its full name) is a label or keyword phrase used on social media platforms such as Twitter and Instagram to categorise or identify content relevant to a particular topic. Hashtags sit on the center of the internet and social media circles, allowing users to find and engage with content based on the hashtagged topic.

Head-to-head competition is an important marketing concept which is used to describe a situation in which two or more companies are directly competing against each other for the same customers. Companies involved in head-to-head competition are typically offering the same or similar products or services, and have a common target market.

Heading tags are HTML tags used to structure webpages and identify the main topics and other key pieces of content. The heading tags range from H1 to H6 and usually appear in the form of a line of text.

A Heatmap is a visual representation of data that uses colour coding to represent different values. It is an effective tool for visually representing and understanding large amounts of data quickly and intuitively, and is commonly used by marketers to analyse user behaviour and performance metrics.

Hidden objections are ideas or concerns that people have regarding a product or service but have difficulty verbalizing. These objections are often unconscious and are hidden even from the person who has them.

Hidden text is text that website visitors can't see but can be read by search engines, thus allowing it to influence the content of a website’s ranking in search engine results pages (SERPs). It is normally hidden by making the text color the same as the background, cropping the text with the same color as the background, or setting the font size to 0.

Home shopping channels, also known as televised retail channels, are retail outlets where goods and services are bought and sold on television. They first appeared in the 1980s, and today, they are a multi-billion dollar industry.

A Homepage is the main page or starting point of a website. Its purpose is to inform visitors what a website is about and to explain what they do.

Hosting is a service provided by a third-party that enables businesses and individuals to store, manage, and distribute content over the internet. It basically involves renting space, bandwidth, and other computing services from a hosting provider, who allows the user to store their data and content on their servers.

A House list is a collection of contact details and other elements related to an individual or organisation. House Lists can include customer information such as customer name, address, contact information, company details, hobbies and interests, and any other vital information about the customer.

A House style is a set of all the standards, guidelines and conventions that apply to the written communications of an organisation. These standards provide a consistent style across all documents and materials being used internally and externally, helping to ensure the overall quality and cohesion of communications.

Hreflang Tags are recommendable elements to include in the HTML code of a website, as it helps inform search engines about the intended language of its content. Hreflang tags provide search engine crawlers with the information they need to associate content written in different languages with each other, and they always appear in the HTML header.

HTML, or HyperText Markup Language, is the standard language for structuring and presenting content on the World Wide Web. It is used to create documents for internet browsers, and to apply styling, layout and other aspects of design to a webpage.

An HTML sitemap is a type of website navigation tool which allows users to easily find specific pages within a larger website. It is a map of a website which lists the different pages of a website, as well as any subpages, so users can quickly and easily find the page they are looking for.

HTTP, which stands for Hypertext Transfer Protocol, is a protocol used for exchanging data across the web - it's basically the language of the internet. It's the basis on which the World Wide Web runs, and the majority of webpages are composed with code written in the HTTP protocol.

HTTPS (Hyper Text Transfer Protocol Secure) is the secure version of the hypertext transfer protocol, which is the foundation of data communication over the internet. Commonly used by websites to protect the privacy and integrity of the data exchanged with visitors, it provides an extra layer of security for online transactions, making it harder for malicious actors to access information travelling between two sites.

A Hyperlink is a simple, yet powerful tool used on the internet which allows users to click through to other webpages or documents. Hyperlinks appear as text or images which allow users to click through or tap on them in order to navigate to a particular webpage or document.