What Is a Domain Name and How to Choose the Right One

Every website lives on a server with its own IP address, a string of numbers such as 192.0.2.10. Computers work well with numbers, but people do not remember them. A domain name solves this: it is the readable address of your website, such as yourbusiness.co.uk, and the Domain Name System (DNS) turns it into the right IP address every time someone types it in. This guide explains how a domain name is built, which domain extensions suit a UK business and how to choose a domain name you will not want to change later.

A domain name is the address people type into the browser, see in search results and use in your email addresses, such as [email protected]. It is separate from web hosting: the domain is the address, and the hosting is the server where the website files are kept. A domain is read from right to left, and each part is separated by a dot:

• Top-level domain (TLD). The part after the last dot, also called the domain extension. Country code TLDs such as .uk, .fr or .de belong to a country, while generic TLDs such as .com, .org and .net and newer ones such as .shop or .app have no country attached. You choose from the extensions that registrars offer and cannot create your own. The .uk family, which includes .uk, .co.uk, .org.uk and .me.uk, is run by Nominet;
• Second-level domain. The name you choose when you register, for example “yourbusiness” in yourbusiness.com. With .co.uk or .org.uk the extension has two parts, so the name you choose sits in front of both. It can contain letters, numbers and hyphens and must be unique within its extension;
• Subdomains. Any parts to the left of your name, such as shop.yourbusiness.co.uk or blog.yourbusiness.co.uk. Once you own a domain, you can create subdomains yourself in its DNS settings, usually at no extra cost.

This is a hierarchy: each level belongs to the level on its right, and the owner of a domain controls everything below it. Above the TLDs sits the DNS root, which technically is a final dot at the end of every address that browsers do not show.

Your domain name will appear on your website, signage, vans, invoices and every email you send, and changing it later means moving the whole site. It is worth spending some time on it. When you choose a domain name, check these four points:

1. Length. Short names are easier to remember, type and say over the phone. If the name has two or three words, try saying it aloud: if people would ask “is that with a hyphen?”, choose the version without one. If you do use a hyphen, consider registering the version without it as well, so it does not end up with someone else.
2. Name. The domain should match your business or brand name, or clearly describe what you do, so customers can guess it. Avoid names that sound like a competitor or a well-known brand: this confuses customers and can lead to a trade mark claim, so check the UK trade mark register before you register the name.
3. Domain extension. If you sell mainly in the UK, .co.uk or .uk tells visitors at once that you are a British business. Google treats country code extensions as a strong sign that a site is meant for that country, while .com and other generic extensions are not tied to any location (Google Search Central). For an international audience, .com is the familiar choice.
4. Spelling. Use plain letters and numbers, and pick words that are easy to spell. Swaps such as “4” for “for”, unusual spellings and doubled letters where two words meet (“yogagym”) cause typos and lost visitors. Domains with accented or non-Latin characters exist, but most UK customers cannot type them easily on a standard keyboard.

If your business has several brands, regions or common misspellings, you can register several domains and point them all to the main website with a permanent (301) redirect. This protects the brand and catches visitors who type the address slightly wrong. When you are ready to register, our guide on how to buy a domain name covers registrars, availability checks and renewal.

Less than many people think. Google’s SEO Starter Guide says that keywords in a domain name alone have hardly any effect on rankings beyond appearing in breadcrumbs, and recommends choosing the name that is best for your business. A domain such as cheap-plumber-oxford-best.co.uk will not rank because of its words, and it looks less trustworthy to customers. Rankings come from useful pages, a sound technical base and a good reputation, which is the work of SEO services. The domain still matters in two ways:

• Your own domain from the start. Free website builders and blogging platforms give you an address on their own domain, such as yourname.platform.com. It looks less professional, you do not own it, and moving to your own domain later means a full website migration with redirects. If you already need to make that move, see our guide on moving a website to another domain;
• History. If you buy a domain that someone else used before, check its past. Look at old versions of the site in the Wayback Machine at archive.org, review its backlink profile in an SEO tool, and search Google for the domain to see what still appears. A domain once used for spam, gambling or adult content can carry that reputation. Google’s spam policies also treat buying an expired domain mainly to manipulate rankings with low-value content as spam.

If you are planning a new website, we can help you choose and register the domain as part of website development. Tell us about your business through our contact page.