The site shows the wrong content or an old version

Almost always caching. Work through the layers from the outside in.

You published a change and the site still shows the old one. Test in this order; each step rules out one layer.

1. Open a private window

   Still old? Your browser was not the problem.

2. Purge the page

   Sites → Cache → Purge URL with the exact address.

3. Check for a second proxy

   Your own Cloudflare account has its own cache and its own purge.

4. Flush the object cache

   Settings that refuse to change are usually a cached option row.

5. Confirm you edited the live site

   More common than it sounds: the change was made on staging, or on the old host whose DNS has not fully switched.

# which server answered, and was it cached
curl -sI https://example.com | grep -i 'server\|cache\|age'