Domain Name This is the most common (and convenient) way to describe a website’s address. It's usually your business name (mine is www.caitlinpieters.com).
URL A URL (“Uniform Resource Locator”) is the online address of a website or web page. This is what you type into a web browser in order to retrieve a specific web page or website. For example, “www.caitlinpieters.com.” A URL is more specific than a domain name, because you can go directly to a specific page on any website. For example, if you'd like to sign up to my newsletter, you'd visit www.caitlinpieters.com/newsletter. This URL is still under the domain name "caitlinpieters.com"
Domain Host / Domain Registry You purchase a domain name from a Domain Host or Domain Registry. Popular domain registries include GoDaddy and 123 Reg. You'd pay them an annual fee for hosting your domain.
Site Host / Hosting Solution A Site Host stores all of the files for your website. These files contain all the code for your site’s pages, images, forms, etc. My website is hosted on Wix. You would pay them a monthly or if you pay for the year upfront you can get a good discount.
Email Host / Email Provider An email address consists of two parts: a recipient (the person receiving the email), and the host (the name that comes after the @ sign, which is usually your website domain). I recommend purchasing an email address from the same company that you buy your domain from.
Apps App is a general term used to describe a programme or tool. They give your website extra functionality such as Live Chat, Online Bookings, Payment Plans etc.
eCommerce / Online Store An eCommerce store is a website that sells products or services online. They are open 24/7 and popular eCommerce platforms include Shopify, Etsy and, Wix.