CRO Glossary
Above-Fold CTA
A call-to-action button or link placed in the visible area of a page before any scrolling is required.
An above-fold CTA is a primary action prompt — 'Buy Now,' 'Sign Up,' 'Start Free Trial' — positioned so it's visible without scrolling on a typical device viewport. The logic is straightforward: not every visitor scrolls, so a call-to-action placed only far down the page may never be seen by a meaningful share of traffic, especially on mobile screens where visible real estate is limited.
That said, above-fold placement isn't automatically better; it depends on how much context or trust-building content (like social proof or pricing details) a visitor needs before they're ready to act. For complex or high-consideration purchases, forcing a CTA above the fold before addressing objections can actually reduce conversion. This is why above-fold CTA placement is a frequent subject of above-the-fold vs below-the-fold testing rather than a fixed best practice.
Example: a SaaS landing page tests moving its 'Start Free Trial' button from below a lengthy features section to directly under the headline. For a low-commitment offer like a free trial, the change lifts conversions; the same move on a page selling an expensive annual plan might not, because visitors still need the supporting detail below the fold first.
Related terms
Above vs Below Median Split
A segmentation technique that divides users into two groups at the median of a metric to compare high and low engagers.
Qualitative Feedback Loop
A recurring process of collecting and acting on user comments, session recordings, and survey responses to inform test hypotheses.
Experiment Metadata
The structured record of who, what, when, and how for a test — hypothesis, owner, dates, variants, and metrics used to track and audit it.
Pre-Test Analysis
The upfront work of validating traffic, metrics, and baseline data quality before launching an experiment.
Above-the-Fold vs Below-the-Fold Messaging Hierarchy
How the order and prominence of value-proposition messaging is split between the visible screen and the rest of the page.
Experiment Contamination
When a control or variant group is unintentionally exposed to the other condition, corrupting the comparison.
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