CRO glossary
The short answer
Conversion rate optimization terms explain how visitors reach an intended action and how that process is evaluated. This topic covers pages, paths, tests and the conversion denominator. Use it to diagnose a specific point of friction without assuming that more form submissions necessarily mean more qualified customers.
By Siddharth Gangal · Updated
Understanding CRO in a business context
CRO is improving a website’s ability to help visitors complete useful actions. The terms in this topic connect page purpose, calls to action, and experiment design. Decide what a worthwhile inquiry looks like before optimizing a button, because more form submissions do not necessarily mean more suitable customers.
Using these definitions in your workflow
Follow the visitor’s path from the entry page to the confirmation. Check that the offer, action wording, and form requirements agree. Define an event that records successful completion rather than just a click. In a test, compare variants under controlled conditions and evaluate quality as well as completion.
A roofer’s inspection form may be easy to submit while failing to collect the address needed to qualify a visit. Removing more fields could increase effort for the office team. Use customer tasks and the business’s actual follow-up process to decide which friction is useful and which blocks a good inquiry.
Checking the evidence behind a report
Inspect a completed task rather than judging a form by its appearance. A click on the submit button is different from the server accepting the request, and either can differ from the office receiving a useful lead. Compare the page’s promise with the confirmation and actual next step.
If an experiment changes the qualifying questions, assess the effect on the office team’s workload. Fewer fields can help suitable visitors, but can also leave staff without the information needed to route a request.
For practical context, use the matching website tool and compare the task with our service scope. Return to the full SEO glossary when the report uses terms from another topic.
Terms in this topic
Each entry below introduces a distinct concept. Open its explanation for the practical procedure and cautions. These definitions describe terminology, not a ranking guarantee. Check the original documentation when a report’s wording or a platform feature changes.
- Conversion rate optimization (CRO)
Conversion rate optimization, or CRO, is improving a website's ability to help visitors complete useful business actions. The work should evaluate lead quality alongside the proportion of visitors who act.
- Conversion rate
Conversion rate is the share of a defined audience or set of visits that completes a defined action. Its meaning depends on the numerator, denominator, and reporting period.
- Landing page
A landing page is the page a visitor first reaches during a visit. Marketers also use the term for pages designed around a campaign and a specific next action.
- Call to action (CTA)
A call to action, or CTA, is a prompt telling a visitor what step to take next. Clear wording should describe the action and help the reader understand what follows.
- A/B testing
A/B testing is comparing variants using a controlled experiment. A useful test defines the audience, allocation method, and outcome before examining which version performed better.
Sources
- A/B Testing Best Practices for Search · accessed October 8, 2026
- Conversions vs. key events in Google Analytics - Analytics Help · accessed October 8, 2026
- Creating Helpful, Reliable, People-First Content · accessed October 8, 2026
