Caching helps WordPress serve content faster by reducing the amount of work the server has to do each time a page is requested.
Why caching matters
Without caching, WordPress often has to build the page dynamically for each visitor. That can involve loading PHP, querying the database, and processing plugin code.
Types of caching
Page caching
Stores a ready-to-serve version of a page.
Browser caching
Lets returning visitors reuse static files they already downloaded.
Object caching
Improves how repeated database queries are handled.
CDN caching
Helps static assets load faster from servers closer to the visitor.
Benefits of caching
- Faster load times
- Lower server load
- Better user experience
- Improved scalability during traffic spikes
Final note
Caching is not a magic fix for every performance issue, but it is one of the most important foundations of a faster WordPress site.