Glossary

Have you ever heard a term but did not know what it meant? Here's a single source of truth for all site speed terminology. You’ll never be stumped again.

Look up and find the definition of any topic or term

A

Anomaly Detection
Application Sequencing

B

Bounce Rate

C

Caching
Category Pages
Connect Time
Content Delivery Network (CDN)
Conversion Rate Optimization (CRO)
Core Web Vitals
Critical Rendering Path
Cumulative Layout Shift
Cyber 5

D

DNS Look Up Time
Document Complete
DOM Load Time
Dynamic Content

F

First Input Delay
Front-end Optimization (FEO)

I

Image Optimization

L

Largest Contentful Paint
Lazyloading

O

Omnichannel
Onload
Order

P

Page Views
Performance Impact Rating (PIR)

R

Real User Monitoring (RUM)
Responsive Design (RWD)

S

Scalability
Sessions
Site Performance Waterfall
Static Content

T

Third Party Tags
Time to Display
Time to First Byte
Time to Interactive
Time to Last Byte
Time to Start Render
Time to Title
TTL (Time to Live)

U

User Experience (UX)

W

Web Performance Optimization (WPO)
Website Performance Evaluation