What is Cache?

Cache refers to a temporary storage area where data is kept to speed up future access. In web systems, caching plays a vital role in performance, especially in reducing load times and server requests.

What Does Cache Do?

Decreases page load time

Reduces server resource usage

Saves bandwidth

Enhances user experience

Boosts SEO rankings

Types of Cache

1. Browser Cache

Stores static files (like CSS, JS, images) on the user’s device. When revisiting a page, content loads directly from the browser.

2. Server-Side Cache

Saves generated versions of a page so the server doesn’t rebuild the content each time. Common in CMS platforms like WordPress.

3. CDN Cache

Content is cached at geographically distributed servers for faster global access.

4. Database Cache

Query results are stored temporarily to avoid repeated database calls.

When Should You Clear Cache?

After updating content or design

After plugin/theme changes

Before launching from staging to live

If layout issues occur for returning users

Note: Clearing cache may temporarily slow down the site until it's rebuilt.

SEO Impact of Caching

Caching improves Core Web Vitals, a ranking factor in Google’s algorithm. Faster sites result in better engagement and higher search visibility.