# What is Lazy Loading? | Yungle glossary

> Lazy loading defers offscreen images and content until a visitor actually scrolls to them.

Source: https://yungle.ai/glossary/lazy-loading/

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Glossary · L

# Lazy Loading

In plain words

Lazy loading is a technique that delays loading images, videos, or other assets until they're about to enter the visitor's viewport, rather than loading everything at once. This reduces initial page weight and improves page speed and Core Web Vitals scores.

Example

Case study images further down the page load only as the visitor scrolls near them, so the first screen appears faster.

Related resources

-   Glossary

    ## Core Web Vitals

    Core Web Vitals are Google's three key metrics for measuring real-world page loading and interactivity.

    [See term](https://yungle.ai/glossary/core-web-vitals)
-   Glossary

    ## Viewport

    The viewport is the visible area of a webpage on a given device's screen.

    [See term](https://yungle.ai/glossary/viewport)
-   Insight

    ## Core Web Vitals for B2B Websites Explained

    What Core Web Vitals measure, the thresholds Google uses, and how to build a B2B website that stays fast after launch instead of fixing it later.

    [Read insight](https://yungle.ai/insights/core-web-vitals-for-b2b-websites)

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