[Articles](https://modexsoftware.nl/en/articles/) # Glossary: website terms in plain language The words you come across when you have a website made, briefly explained. Where an article goes deeper into a term, the link is included. AIOAI optimisation: setting up your site so that AI assistants such as ChatGPT and Google's AI answers understand it and can cite it as a source. Read [What is AIO?](https://modexsoftware.nl/en/articles/what-is-aio/) Alt textA short description of an image in the page's code. A screen reader reads it aloud, and a search engine knows what is in the photo. CanonicalA line in the code that says what the real address of a page is. That way a search engine doesn't count two addresses with the same content as two pages. CMSContent management system: the admin area where you change texts, blogs or products yourself, without code. Read [What is a CMS, and do you need one?](https://modexsoftware.nl/en/articles/what-is-a-cms/) Core Web VitalsThree Google measurements of how a page feels: how quickly the largest content appears (LCP), how quickly the page responds to a tap (INP) and whether content shifts while loading (CLS). Read [How fast should a website load on a phone?](https://modexsoftware.nl/en/articles/how-fast-should-a-website-load/) DNSThe address book of the internet. The DNS settings of your domain name say where your website is and which server your email arrives at. Domain nameThe address of your site, such as yourbusiness.nl. Make sure it is in the name of your own business. Read [Is your domain name in your own name?](https://modexsoftware.nl/en/articles/domain-name-in-your-own-name/) Structured dataExtra lines in the code that tell search engines in a fixed format who you are: name, town, opening hours, prices. The conventions for this are on [schema.org](https://schema.org/). Google Business ProfileYour free listing in Google Search and Google Maps, with address, opening hours, photos and reviews. Read [Setting up your Google Business Profile properly](https://modexsoftware.nl/en/articles/set-up-google-business-profile/) HostingThe place where your website lives and from where it is sent to visitors. With us, hosting is included in the monthly fee. Read [Hosting more expensive or down?](https://modexsoftware.nl/en/articles/hosting-price-rise-or-outage/) HTTPS and SSL certificateThe padlock in the address bar: the connection between visitor and site is encrypted. Without HTTPS the browser shows a warning. iDEALThe Dutch way of paying online through your own bank. In an online shop a payment provider such as Mollie handles this. Read more under [online shops](https://modexsoftware.nl/en/online-shops/). IMAPThe way your email program fetches your mail from the server, so your phone and computer show the same thing. Read [Setting up your email](https://modexsoftware.nl/en/guides/email-setup/) IndexingAdding a page to a search engine. A page that is not indexed cannot be found. In Google Search Console you can see which pages are included. IndexNowA way to tell search engines straight away that a page is new or has changed. Bing uses it; for Google you request indexing in Search Console. llms.txtA text file on your site with an overview for AI assistants: what is where, in plain text. The proposal is on [llmstxt.org](https://llmstxt.org/); ours is at [/llms.txt](https://modexsoftware.nl/llms.txt). MX recordThe line in the DNS that says which mail server receives the email for your domain. Set it up wrongly and your email arrives nowhere. One-pagerA website of one page with everything below each other. Enough for many freelancers and small businesses; with us that is the Start package, from €249 (excl. VAT). PluginAn extension for WordPress or another system, often made by another party. Every plugin needs updating. Read [WordPress or a website without plugins?](https://modexsoftware.nl/en/articles/wordpress-or-no-plugins/) ResponsiveA site that adapts to the screen: large and readable on the phone, not a shrunken desktop page. In our [research](https://modexsoftware.nl/en/research/business-websites-construction-and-engineering/) among 2,490 business websites, 7.5% was not made for this (September 2026). SEOSearch engine optimisation: setting up your site so that Google understands it and can show it for the right searches. Read [SEO and AIO](https://modexsoftware.nl/en/seo-and-ai/) SitemapA list of all the pages on your site for search engines, usually at /sitemap.xml. Ours is at [/sitemap.xml](https://modexsoftware.nl/sitemap.xml). SPF, DKIM and DMARCThree DNS settings that show that email sent on behalf of your domain really comes from you. Without them your email ends up in spam more quickly. Read [Moving your website without email downtime](https://modexsoftware.nl/en/articles/move-your-website-without-email-downtime/) ThemeThe ready-made design of a WordPress site. Like a plugin, a theme needs updates. AccessibilityA site that also works for people who see poorly, use a screen reader or only use the keyboard. Read [Is your website accessible?](https://modexsoftware.nl/en/articles/make-your-website-accessible/) Transfer codeThe code you use to move a domain name to another provider. You request it from your current provider; it is also called an authorisation code. ## Seeing is believing. The preview is free. Tell us the name of your business. Within 12 hours you have a link to your new site in your inbox. If you don't like it, you won't hear from us again. Rather ask something first? [Send a message](https://modexsoftware.nl/en/contact/) or email [info@modexsoftware.nl](mailto:info@modexsoftware.nl). --- Bron: https://modexsoftware.nl/en/articles/glossary/