Glossary

Understand web performance &
digital experience optimization

Clear definitions of the metrics, concepts, and signals that impact site speed, search rankings, user behavior, and revenue.

Bounce rate

User Experience

Bounce Rate is a web analytics metric that measures the percentage of website sessions that are not considered 'engaged' within Google Analytics 4 (GA4).

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Cart abandonment signals

Ecommerce

Cart abandonment signals are behavioral and technical indicators that suggest a shopper is likely to leave a website after adding items to their cart without completing a purchase.

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Checkout Friction

CRO

Checkout Friction refers to any obstacle, delay, or confusion that makes it harder for a user to complete a purchase during the checkout process. Even small issues—like slow-loading steps, unnecessary form fields, or unclear errors—can interrupt purchase intent and cause motivated buyers to abandon before finishing their order.

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CLS

User Experience CWV Ecommerce Analytics

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Lab data vs. field data

User Experience

Lab Data (Synthetic Monitoring) and Field Data (Real User Monitoring) represent the two fundamental ways to measure website performance, each serving a distinct but complementary purpose.

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Perceived load speed

User Experience

Perceived Load Speed (PLS) is a subjective measure of how fast a website feels to a user, which is often more critical for retention than the actual technical load time.

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Product Discovery

Ecommerce

Product Discovery is the process by which users find relevant products on an ecommerce site through navigation, search, filters, and recommendations. When discovery works well, users quickly reach products that match their intent; when it fails, even high-intent visitors leave without ever viewing the items they came for.

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Revenue Per Visitor

Revenue

Revenue Per Visitor (RPV) measures how much revenue, on average, each visit to your website generates. It combines conversion rate and average order value into a single metric, showing how effectively your site turns traffic into actual revenue.

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Time to First Byte

Performance

Time to First Byte (TTFB) is a performance metric that shows how quickly your server starts responding after a browser makes a request.

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