What caching actually does
Every time someone visits a typical WordPress page, the server builds it from scratch by running code and querying the database. That takes time, especially when many people visit at once.
Caching saves a ready-made copy of the page so it can be delivered almost instantly to the next visitor.
Quick tip
After changing your site, clear the cache so visitors see the latest version.
The main types of caching
Page caching stores complete pages on the server. Browser caching tells visitors’ browsers to keep files like images and styles, so repeat visits load faster. A content delivery network stores copies of your files closer to visitors around the world.
Most sites benefit from all three, and many good hosts include some of them automatically.
Set it up carefully
Use one well-supported caching plugin or your host’s built-in tools, not several at once, as they can conflict. Exclude pages that must stay personal, such as carts, checkouts and account areas.
Test your forms, logins and checkout after enabling caching to make sure everything still works as expected.
Your practical checklist
- Check what caching your host already provides.
- Use one caching solution, not several.
- Exclude cart, checkout and account pages.
- Enable browser caching for images and files.
- Test key features after turning caching on.
