User Experience (UX)
All terms
Fabian Krumbholz
April 8, 2026•1 min read
Related web performance terms
- URL Parameter
A URL parameter (also known as a query string) is the part of a URL that follows a question mark (?), used to pass data to the server (e.g., ?utm_source=google).
- User Timing
User Timing is a browser API that allows developers to create custom, application-specific timestamps in their code to measure the performance of certain operations.
- A/B Testing
A/B testing is a method of comparing two versions of a webpage to see which one performs better. For example, an e-commerce store might show 50% of its visitors a green "Buy Now" button (Version A)…
- AVIF
AVIF (AV1 Image File Format) is a modern, next-generation image format that provides significantly better compression than older formats like JPEG and WebP.