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THE PLAIN-ENGLISH REFERENCE

Digital and Business Glossary

A clearly navigable A–Z glossary of common digital and business terms.

AEO

Answer engine optimization: structuring clear, supported information so answer systems can understand and cite it. The term is evolving and does not promise inclusion.

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Analytics

The collection and interpretation of selected data about visits, actions, and outcomes. Analytics is incomplete unless implementation and consent choices are understood.

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Automation

A rule or workflow that performs a repeatable action, such as routing a form submission. Automation still needs monitoring and ownership.

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CMS

Content management system: software used to create and manage website content without editing every page as raw code.

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Conversion

A defined action considered valuable, such as a completed inquiry. It is a measurement choice, not automatically a sale.

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Conversion rate

Conversions divided by the relevant opportunities, commonly expressed as a percentage. The denominator must be stated.

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CPA

Cost per acquisition or action. The exact action must be named before comparing CPA figures.

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CPC

Cost per click: advertising spend divided by recorded clicks.

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CPL

Cost per lead: spend divided by leads under a stated lead definition.

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CRM

Customer relationship management system: a tool for organizing contacts, interactions, and sales or service activity.

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DNS

Domain Name System: records that direct a domain toward services such as a website or email.

Domain

A human-readable internet name, such as example.com. Registration grants time-limited control subject to the registrar agreement; it is not the website itself.

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GEO

Generative engine optimization: an evolving label for making information understandable and citeable in generative search experiences. It has no single universal standard.

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Hosting

Computing and storage that make site files or applications available online.

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Landing page

A page designed around a specific audience or action, often connected to a campaign.

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Local SEO

Work intended to improve a business’s visibility for geographically relevant searches and map results.

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Plugin

An add-on that extends a software platform. Plugins can add features but also add maintenance, compatibility, and security responsibilities.

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PPC

Pay per click: an advertising pricing model in which a click can generate a charge. Not every ad platform or campaign uses only this model.

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Profit

The amount remaining after the relevant expenses are subtracted from revenue. Gross, operating, and net profit are different measures.

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Revenue

Income generated before the relevant expenses are deducted. Revenue is not the same as cash on hand or profit.

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SEO

Search engine optimization: improving crawlability, clarity, usefulness, and other signals that may help organic search visibility. Rankings are not guaranteed.

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SSL/TLS

TLS is the current protocol that encrypts data in transit; “SSL certificate” is still common shorthand even though modern sites use TLS.

Theme

A collection of templates and styles controlling much of a site’s presentation.

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WordPress

An open-source content management system. WordPress.org software differs from the hosted WordPress.com service.

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Sources & transparency

Information checked: . This date is not a guarantee of ongoing accuracy.

  1. About Domain Names — ICANN — accessed 2026-09-16

    Supports glossary definitions and terminology context.

  2. What is DNS? — Cloudflare Learning Center — accessed 2026-09-16

    Supports glossary definitions and terminology context.

  3. What is TLS? — Cloudflare Learning Center — accessed 2026-09-16

    Supports glossary definitions and terminology context.

  4. What is WordPress? — WordPress.org Support Manual — accessed 2026-09-16

    Supports glossary definitions and terminology context.

  5. SEO Starter Guide — Google Search Central — accessed 2026-09-16

    Supports glossary definitions and terminology context.

  6. About pay-per-click advertising — Google Ads Help — accessed 2026-09-16

    Supports glossary definitions and terminology context.

  7. About events — Google Analytics Help — accessed 2026-09-16

    Supports glossary definitions and terminology context.

  8. Manage your finances — U.S. Small Business Administration — accessed 2026-09-16

    Supports glossary definitions and terminology context.

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Digital and Business Glossary
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